Coupons Used Across Different Types of Businesses: A Comprehensive Guide
- Graham Robinson
- 1 day ago
- 13 min read

Coupons have become a ubiquitous part of the global consumer experience, shaping the way people shop, dine, and engage with brands both online and offline. From humble beginnings as simple paper vouchers to today’s sophisticated digital codes and app-based offers, coupons are now a central pillar of marketing strategies across virtually every sector. This comprehensive guide explores the diverse landscape of coupon usage across different types of businesses, analyzes the advantages and disadvantages of coupon marketing, and provides real-world examples that illustrate both the power and the pitfalls of this promotional tool. By understanding the nuances of coupon strategies, businesses can maximize their benefits while mitigating the risks, ensuring that coupons serve as a catalyst for growth, loyalty, and innovation in an ever-evolving marketplace.
Introduction: The Power and Prevalence of Coupons
Coupons are more than just a means to save money-they are a dynamic marketing instrument that influences consumer behavior, drives sales, and fosters brand loyalty. Recent statistics reveal that over 90% of consumers have used a coupon at some point, with digital coupon usage rising sharply in recent years as mobile and online shopping become the norm56. The psychological appeal of getting a deal is universal, making coupons an effective way for businesses to attract new customers, encourage repeat purchases, and even clear out excess inventory. Yet, the widespread adoption of coupons also brings challenges, from margin erosion to the risk of brand devaluation. This guide will delve into the history, types, applications, and outcomes of coupon usage, equipping readers with the knowledge to harness coupons effectively across different business models.
The History and Evolution of Coupons
The Birth of Coupons: Coca-Cola’s Revolutionary Idea
The modern coupon traces its roots to the late nineteenth century, when Coca-Cola’s founder Asa Candler devised a novel strategy to introduce his beverage to a wider audience. In 1887, Candler began distributing handwritten coupons offering a free glass of Coca-Cola, a move that not only popularized the drink but also laid the foundation for coupon marketing as we know it today34. By 1913, an estimated 8.5 million people had redeemed these coupons, helping Coca-Cola transition from a regional curiosity to a national sensation.
Expansion Through Economic Hardship and Prosperity
The effectiveness of coupons became especially apparent during the Great Depression of the 1930s, when financially strained families sought every possible means to stretch their budgets. Grocery stores and manufacturers adopted coupons to entice shoppers, build brand loyalty, and move inventory34. The post-World War II consumer boom further accelerated coupon usage, with brands printing coupons in local newspapers and magazines, offering cents-off discounts on everyday essentials.
The Newspaper and FSI Era
By the mid-twentieth century, coupons had become a staple of American households, distributed through free-standing inserts (FSIs) in newspapers and direct mail. The rise of supermarkets in the 1940s and 1950s saw an explosion in grocery coupon redemption, with 100 million coupons redeemed in the United States in 1957 alone3. By the late 1970s, over 300 billion coupons were distributed annually, cementing their place in consumer culture.
The Digital Revolution
The advent of the internet and mobile technology transformed coupon marketing yet again. Digital coupons, downloadable codes, and app-based offers began to supplant traditional paper coupons, offering greater convenience and personalization. By 2019, over one billion mobile coupons were redeemed globally, and digital coupon users in the United States numbered in the hundreds of millions56. Today, digital coupons are not only easier to distribute and track but also enable sophisticated targeting and analytics, allowing businesses to refine their promotional strategies in real time.
The Modern Coupon Landscape
In the current era, coupons are available in myriad forms, from QR codes and personalized app offers to social media exclusives and gamified promotions. The shift toward digital has also introduced new challenges, such as coupon fraud and the need for robust tracking systems. Nevertheless, the core appeal of coupons remains unchanged: they offer consumers a tangible incentive to engage with brands, while providing businesses with a powerful lever to drive growth and loyalty.
Types of Coupons Used in Modern Business
Percentage-Based Discounts
One of the most common and effective types of coupons is the percentage-based discount, which offers customers a certain percentage off their purchase. This format is versatile, appealing to both price-sensitive shoppers and those seeking high-value deals. For example, a retailer might offer 20% off all items during a seasonal sale, or a restaurant might provide 15% off the total bill for first-time diners1212.
Fixed Amount Off
Fixed amount coupons provide a set monetary discount, such as $10 off a purchase of $50 or more. This type of coupon is particularly effective in encouraging higher order values, as customers are incentivized to reach a minimum spend threshold to unlock the savings212.
Buy-One-Get-One (BOGO) Offers
BOGO promotions, where customers receive a free or discounted item with the purchase of another, are popular in both retail and food service industries. These offers not only increase the quantity of goods sold but also create a sense of urgency and value1212.
Free Shipping Coupons
In the world of e-commerce, free shipping is a powerful incentive. Coupons that eliminate shipping costs can be the deciding factor for customers on the fence about completing a purchase, especially when competing retailers offer similar products1212.
Loyalty-Based Discounts
Many businesses reward repeat customers with loyalty-based coupons, such as points-based rewards, exclusive discounts for members, or special offers for frequent buyers. These programs foster long-term relationships and encourage ongoing engagement1212.
Seasonal and Holiday Promotions
Coupons tied to specific seasons or holidays-such as Black Friday, Christmas, or back-to-school sales-capitalize on heightened consumer activity and create a sense of occasion. Limited-time offers during these periods can drive significant spikes in sales1212.
Early Payment and Subscription Discounts
Service-based businesses often use early payment discounts to encourage prompt payment of invoices, or offer reduced rates for customers who commit to longer subscription terms2.
Digital vs. Paper Coupons
While paper coupons remain in use, especially among older demographics, digital coupons have rapidly gained ground due to their convenience and ease of distribution. Mobile-specific formats, such as QR codes and app-based offers, are particularly popular among younger consumers56.
Personalized and Gamified Coupons
Advances in data analytics have enabled businesses to create highly personalized coupon offers based on individual purchase history and preferences. Gamified coupons-such as spin-to-win wheels or scratch cards-add an element of fun and engagement, increasing the likelihood of redemption1112.
Referral and Social Media Coupons
Referral coupons reward customers for introducing new business, while social media-exclusive coupons drive engagement and brand visibility on platforms like Instagram and Facebook12.
Coupon Usage Statistics and Effectiveness
Prevalence of Coupon Use
The vast majority of consumers-over 90% in the United States-have used a coupon, with digital coupon redemption rates rising steadily in recent years56. In 2022, 177.9 million American adults redeemed digital coupons, and 86% of online shoppers reported being more likely to try a new business due to a coupon5.
Digital vs. Traditional Coupon Redemption
Digital coupons are now favored over traditional paper options, with 67% of consumers using digital coupons compared to 59% using physical coupons in 202356. Mobile coupons, in particular, boast redemption rates up to ten times higher than their paper counterparts6.
Impact on Consumer Behavior
Coupons significantly influence purchasing decisions. Thirty-eight percent of consumers buy more than they intended when they have a coupon, and 67% will make an unplanned purchase because of a coupon56. Additionally, 68% of consumers say coupons generate loyalty, and 39% have purchased a product earlier than planned due to a coupon56.
ROI and Business Outcomes
For businesses, the return on investment (ROI) from coupon campaigns can be substantial. Coupon users spend 24% more than non-users, and retailers report up to a 50% increase in conversions when offering coupons6. However, the average redemption rate for all coupons remains low-less than 1%-highlighting the importance of targeted, well-designed campaigns56.
Demographic Trends
Younger consumers are more likely to use digital coupons, with over 50% of those under 44 redeeming digital offers in 20235. Higher-income shoppers are also frequent users, with 65% of those earning over $150,000 per year using digital discount coupons5.
Coupon Applications in Retail Businesses
Implementation Strategies
Retailers have long relied on coupons to drive foot traffic, clear inventory, and boost sales during slow periods. Strategies range from in-store paper coupons and FSI inserts to personalized digital codes delivered via email or mobile apps713. Retailers often segment their customer base to deliver targeted offers, maximizing relevance and redemption rates.
Case Studies: Retail Successes
One notable example is StyleSavvy, an online fashion platform that implemented a multi-tier coupon program offering discounts for referrals, repeat purchases, and social sharing. This strategy led to a 40% increase in repeat customers and a 25% reduction in customer acquisition costs within six months16.
Inventory Management and Seasonal Approaches
Coupons are invaluable for managing inventory, especially for seasonal items or overstocked products. Retailers may offer deep discounts on out-of-season merchandise to free up shelf space, or run flash sales to create urgency and excitement1212.
Personalization and Analytics
The use of data analytics allows retailers to personalize coupons based on purchase history, preferences, and shopping behavior, resulting in higher redemption rates and improved customer satisfaction713. Tracking and analyzing coupon usage also provides insights into campaign effectiveness and customer preferences.
Coupon Applications in Service Industries
Restaurant and Hospitality Strategies
Service businesses, including restaurants, hotels, and spas, use coupons to attract new customers, encourage repeat visits, and fill capacity during off-peak periods910. For example, hotels may offer time-based discounts for off-season stays, volume-based deals for group bookings, or value-added packages that include complimentary services10.
Bundling and Upselling
Coupons can be used to bundle services, encouraging customers to try additional offerings or upgrade their experience. For instance, a spa might offer a discounted package that includes a massage and a facial, or a restaurant might provide a free appetizer with the purchase of two entrées9.
Loyalty Building and Retention
Targeted coupons for loyal customers-such as exclusive member discounts or referral rewards-help service businesses build long-term relationships and encourage repeat business910. Automated post-visit emails with personalized offers can reactivate dormant customers and drive future bookings.
Real-World Examples
Yummy, a food delivery app, implemented a referral coupon scheme that resulted in a 300% increase in its user base and a 400% boost in revenue within six months16. The program rewarded both new and existing users, generating viral word-of-mouth marketing and attracting high-quality customers.
Coupon Applications in Online Businesses
E-Commerce Coupon Strategies
Online businesses leverage coupons in a variety of ways, from exit-intent popups that offer discounts to prevent cart abandonment, to email campaigns that reward newsletter subscribers with exclusive codes81112. App-based coupons and social media exclusives further expand the reach and effectiveness of digital promotions.
Tracking, Analytics, and A/B Testing
Digital coupons offer unparalleled tracking capabilities, allowing businesses to monitor redemption rates, customer behavior, and campaign ROI in real time813. A/B testing different coupon formats and offers enables continuous optimization and improved performance.
Personalization and Gamification
Personalized coupons based on browsing or purchase history increase relevance and redemption rates, while gamified promotions-such as spin-to-win wheels or scratch cards-enhance engagement and create memorable experiences1112.
Case Studies: Online Successes
A SaaS company increased its conversion rate by 300% through a targeted coupon campaign, generating over $100,000 in revenue and achieving an ROI of more than 500%16. The campaign also provided valuable insights into customer segments and preferences, informing future marketing efforts.
Advantages of Coupon Usage for Businesses
Customer Acquisition and Sales Growth
Coupons are a proven tool for attracting new customers and driving immediate sales. By lowering the barrier to entry, coupons entice hesitant shoppers to try a product or service, often leading to increased purchase frequency and higher average order values1314.
Brand Awareness and Loyalty
Promotional offers increase brand visibility, especially when shared on social media or through referral programs. Coupons also foster loyalty by rewarding repeat customers and creating a sense of exclusivity1314.
Inventory Management and Data Collection
Coupons help businesses manage inventory by moving slow-selling or seasonal items, freeing up resources for new products. The data collected from coupon usage provides insights into customer behavior, preferences, and campaign effectiveness, enabling more targeted marketing in the future1314.
Word-of-Mouth and Competitive Advantage
Satisfied customers who benefit from coupons are more likely to recommend a business to others, generating valuable word-of-mouth marketing. Coupons also provide a competitive edge, especially in crowded markets where price-sensitive shoppers are comparing multiple options14.
Measurable ROI
The impact of coupon campaigns can be measured with precision, allowing businesses to calculate ROI and refine their strategies for maximum effectiveness1314.
Disadvantages and Risks of Coupon Marketing
Profit Margin Reduction
The most significant drawback of coupon usage is the reduction in profit margins. Deep discounts can erode profitability, especially if not offset by increased sales volume or higher customer lifetime value15.
Brand Value Perception
Frequent or excessive discounting can damage a brand’s perceived value, conditioning customers to expect lower prices and undermining full-price sales15. This can lead to a “race to the bottom,” where businesses are forced to continually offer discounts to remain competitive.
Discount-Dependent Customers
Over-reliance on coupons may create a customer base that only shops when discounts are available, making it difficult to generate full-price sales and maintain healthy margins15.
Operational Challenges and Fraud Risks
Managing coupon campaigns requires careful planning and robust systems to prevent abuse and fraud. Generic codes can be easily shared or exploited, leading to unintended losses and reputational damage15.
Cannibalization and Resource Requirements
Coupons may cannibalize existing sales by offering discounts to customers who would have purchased at full price. Additionally, managing coupon campaigns requires resources for tracking, fulfillment, and customer service, which can strain smaller businesses15.
Third-Party Coupon Site Complications
Listing coupons on third-party sites can increase reach but also reduces control over distribution and brand messaging. Offers may be shared beyond the intended audience, diluting their effectiveness and potentially harming profitability15.
Real-World Success Stories
StyleSavvy: Multi-Tier Coupon Program
StyleSavvy, an online fashion platform, implemented a multi-tier coupon program that rewarded new customers, referrals, and social sharing. The results were impressive: a 40% increase in repeat customers, a 60% rise in referrals, and a 25% reduction in customer acquisition costs within six months16.
Yummy: Referral Scheme Drives Explosive Growth
Yummy, a food delivery app, launched a referral coupon scheme that incentivized both new and existing users. The campaign led to a 300% increase in the user base and a 400% boost in revenue, demonstrating the viral potential of well-designed coupon programs16.
Bloom & Wild: Segmented Personalization
Bloom & Wild, a UK-based flower delivery service, used customer segmentation and personalized coupons to increase retention and referrals. By tailoring offers to different customer segments and encouraging sharing, the company achieved a 25% increase in retention, a 35% rise in referrals, and a 40% growth in revenue16.
SaaS Company: Conversion Rate Breakthrough
A SaaS company achieved a 300% increase in conversion rate through a targeted coupon campaign, generating over $100,000 in revenue and gaining valuable insights into customer preferences. The campaign’s success was attributed to precise targeting, compelling offers, and robust tracking16.
Cautionary Tales and Failures
KFC’s Oprah Promotion Disaster
In 2009, KFC partnered with Oprah Winfrey to offer free meal coupons, resulting in over 10 million redemptions and an estimated $40 million loss. The company was unprepared for the overwhelming response, leading to supply shortages, customer frustration, and negative publicity17.
Hoover’s Free Flights Fiasco
Hoover’s 1992 promotion offered free flights with the purchase of select products, but the cost of fulfilling the offer far exceeded the value of the products sold. The company was unable to honor all claims, resulting in a damaged reputation, legal action, and the dismissal of top executives17.
Domino’s Tattoo Campaign Issues
Domino’s Russia offered a lifetime supply of pizza to customers who tattooed the company’s logo on their bodies. The campaign went viral, with hundreds of participants, forcing Domino’s to abruptly end the promotion and limit the number of winners, leading to backlash and negative press.
Lessons Learned
These cautionary tales highlight the importance of careful planning, clear terms and conditions, and realistic forecasting when implementing coupon campaigns. Overly generous or poorly managed offers can lead to financial losses, reputational damage, and operational chaos.
Best Practices for Implementing Coupon Strategies
Strategic Planning and Goal Setting
Successful coupon campaigns begin with clear objectives, whether it’s acquiring new customers, clearing inventory, or boosting off-peak sales. Setting measurable goals ensures that campaigns are aligned with broader business strategies7813.
Timing, Targeting, and Personalization
The timing and duration of coupon offers should be carefully considered to maximize impact and avoid customer fatigue. Segmenting the audience and personalizing offers based on behavior and preferences increases relevance and redemption rates7813.
Distribution Channel Optimization
Choosing the right distribution channels-email, mobile apps, social media, or third-party sites-ensures that coupons reach the intended audience. Integrating coupons with booking or checkout systems streamlines the redemption process and enhances the customer experience781310.
Tracking, Analytics, and A/B Testing
Robust tracking and analytics are essential for measuring campaign effectiveness and ROI. A/B testing different formats, offers, and channels allows businesses to refine their strategies and maximize results7813.
Fraud Prevention and Resource Management
Implementing single-use or personalized codes reduces the risk of fraud and abuse. Clear terms and conditions, coupled with automated tracking systems, help manage redemption and prevent operational challenges781315.
Balancing Discounts with Profitability
Striking the right balance between attractive offers and sustainable margins is critical. Limiting the frequency and depth of discounts prevents brand devaluation and ensures long-term profitability781315.
Conclusion: The Future of Coupon Marketing
Coupons remain a vital tool in the marketer’s arsenal, offering a flexible and effective way to drive sales, acquire customers, and build loyalty across a wide range of businesses. The evolution from paper vouchers to digital and personalized offers has expanded the possibilities for targeted, data-driven campaigns that deliver measurable results. However, the advantages of coupon marketing must be weighed against the risks of margin erosion, brand dilution, and operational complexity. By learning from both the successes and failures of past campaigns, businesses can implement coupon strategies that are both innovative and sustainable.
Looking ahead, the future of coupon marketing will be shaped by advances in technology, greater personalization, and the integration of artificial intelligence and machine learning. As consumer expectations continue to evolve, businesses that embrace data-driven, customer-centric coupon strategies will be best positioned to thrive in an increasingly competitive marketplace. The key is not simply to offer discounts, but to do so in a way that enhances brand value, fosters loyalty, and drives long-term growth. For businesses seeking to harness the full potential of coupons, the time to act is now-strategically, thoughtfully, and with a keen eye on both opportunity and risk.
Citations:
https://www.indeed.com/career-advice/career-development/discounts-types
https://www.tomorrowsworldtoday.com/consumer-products/evolution-of-coupons/
https://www.exabytes.my/blog/coupon-marketing-strategies-tips-best-practices-for-retail/
https://www.littlehotelier.com/blog/get-more-bookings/hotel-coupons/
https://www.shortstack.com/blog/pros-and-cons-of-coupon-codes
https://www.hostpapa.com/blog/ecommerce/16-types-of-coupons-your-ecommerce-store-should-offer/
https://www.bargainboxed.com/blogs/articles/digital-coupons-vs-paper-coupons-which-saves-more-money
https://trendyfoxstudio.com/products/black-modern-coupon-card-discount-card-canva-template-ashe
https://www.microsoft.com/en-us/edge/learning-center/understanding-digital-coupons
https://www.pinterest.com/ideas/coupon-design-layout/899265690990/
https://www.supermarketnews.com/consumer-trends/shoppers-prefer-digital-coupons-over-paper
https://www.retailtouchpoints.com/blog/a-brief-history-of-the-coupon-and-its-future
https://business.time.com/2010/04/06/the-history-of-coupons/
https://products.eventgroove.com/blog/articles/the-history-of-coupons/
https://theipm.org.uk/redeeming-the-past-present-future-of-couponing/
https://mandlik-rhodes.com/the-complete-history-of-coupons-in-the-modern-world/
https://www.linkedin.com/pulse/coupon-marketing-how-started-arturo-ederosas-hzdce
https://www.supermarketnews.com/grocery-operations/100-years-and-still-counting
https://partnerize.com/resources/blog/the-evolution-of-couponing
https://creslane.com/from-paper-to-pixels-the-evolution-of-coupons-in-the-digital-age/
https://ksmmedia.com/intel/the-evolution-of-coupon-delivery/
https://www.ebsco.com/research-starters/science/coupons-and-rebates
https://blog.qyubic.com/bhr-en/coupons-that-changed-brand-marketing/
https://andrewchen.substack.com/p/the-creation-of-the-coupon-and-how
https://www.snipp.com/blog/digital-coupon-marketing-trends-strategies
https://www.statista.com/statistics/1490334/us-frequency-digital-coupon-usage/
https://www.snipp.com/blog/the-digital-coupon-market-infographic
https://www.statista.com/statistics/1490233/us-monthly-savings-digital-coupons/
https://www.voucherify.io/blog/23-coupon-statistics-you-need-to-know-about-in-2023
https://ajis.aaisnet.org/index.php/ajis/article/download/2469/951/8603
https://www.loyal.guru/offers/coupon-marketing-strategy-retail/
https://www.bigcommerce.com/glossary/what-roi-digital-coupons-and-how-do-you-track-it/
https://www.opia.com/insights/coupon-voucher-statistics-and-trends/
https://www.flycart.org/blog/ecommerce/retail-discount-strategy
https://www.opia.com/insights/coupon-marketing-strategies-benefits-key-tactics-for-success/
https://www.openloyalty.io/insider/effective-coupon-marketing-with-alex-sussel
https://www.crowntv-us.com/blog/retail-promotional-campaigns/
https://www.shopify.com/retail/retail-discounts-with-profits
https://xccommerce.com/do-coupons-have-a-place-in-todays-digital-world/
https://www.flycart.org/blog/woocommerce/digital-coupon-marketing
https://makewebbetter.com/blog/ecommerce-coupon-marketing-strategies/
https://www.voucherify.io/blog/18-insanely-effective-coupon-campaigns-you-need-right-now
https://www.optimonk.com/how-to-offer-online-coupons-without-killing-your-profits/
https://www.freepik.com/free-photos-vectors/restaurant-coupon
https://www.opia.com/insights/guide-to-coupon-management-systems/
https://businesscollective.com/how-to-use-coupons-to-promote-a-local-business/index.html
https://travelerwp.com/best-tips-for-offering-your-hotel-business-coupons/
https://www.business.com/articles/use-coupons-to-drive-engagement/
https://www.indoormedia.com/blog/3-restaurant-coupon-examples-that-fill-seats
https://hello.pricelabs.co/strategies-for-hotel-coupons-deals-promo-codes/
https://www.shopify.com/hk-en/enterprise/blog/pricing-strategies-discount-strategies-and-tactics
https://world.siteground.com/blog/coupon-marketing-strategy/
https://codebroker.com/the-challenge-of-implementing-digital-single-use-manufacturer-coupons/
https://blog.woobox.com/2018/10/how-to-plan-an-online-coupon-marketing-strategy-for-your-business/
https://www.snipp.com/blog/building-a-digital-coupon-strategy
https://www.convertcart.com/blog/online-sales-promotion-ideas-ecommerce
https://www.businessnewsdaily.com/1002-coupon-effect-business.html
https://koronapos.com/blog/advantages-of-coupons-for-retail-businesses/
https://www.talon.one/blog/5-reasons-your-business-needs-coupons
https://www.business-money.com/announcements/are-coupons-a-good-idea-for-your-business/
https://www.paypal.com/us/brc/article/do-discount-codes-motivate-consumers
https://www.omnisend.com/blog/the-advantages-and-disadvantages-of-discounts/
https://hbr.org/2024/06/research-smaller-more-precise-discounts-could-increase-your-sales
https://imonggo.com/sme-blog-articles/the-benefits-of-promotions-for-your-business/
https://www.venderup.com/blogs/benefits-of-discount-coupon-promotion
https://www.crmcarecloud.com/5-effective-discount-strategies-to-boost-sales/
https://elevate-digital-solutions.com/disadvantages-of-discounts-and-what-you-can-do-instead/
https://www.shortstack.com/blog/the-pros-and-cons-of-using-coupon-codes
https://positivemomentum.com/the-dangers-of-discounting-and-how-to-get-it-right/
https://searchengineland.com/coupon-sites-the-hidden-threat-to-your-brand-449187
https://www.pinpointpayments.com/blog/the-pitfalls-of-discounts-how-they-can-harm-your-business
https://accountinginsights.org/what-is-a-disadvantage-of-using-coupons-as-a-sales-promotion/
https://pros.com/learn/blog/seven-discounting-tactics-that-do-not-put-your-pricing-strategy-at-risk
https://www.articlecube.com/5-unknown-pros-and-cons-coupons-your-business
https://bluepear.net/blog/coupon-affiliates-and-brand-safeguard
https://magid.com/news-insights/5-risks-discounting-and-couponing-retail/
https://www.incentivesmart.com/blog/7-dangers-of-discounting/
https://ekata.com/resource/the-dark-side-of-discounts-understanding-and-preventing-promo-code-abuse/
https://blog.wishpond.com/post/115675448062/coupon-marketing-strategy
https://www.wordstream.com/blog/ws/2020/10/13/sales-promotion-examples
https://webeyez.com/why-tracking-coupon-code-failures-is-a-must/
https://sloanreview.mit.edu/article/the-perils-of-social-coupon-campaigns/
https://beyondnichemarketing.com/2009/05/09/kfc-coupon-disaster/
https://www.talon.one/blog/coupon-code-best-practices-and-how-to-use-them-with-real-examples
https://www.starterstory.com/ideas/coupon-business/success-stories
https://blog.uniqodo.com/5-pitfalls-of-coupon-marketing-strategies
https://listverse.com/2020/06/23/top-10-half-baked-sales-promotions-that-ended-in-disaster/
https://inck.com.au/when-creative-marketing-goes-wrong-3-promotional-marketing-fails/
https://mandlik-rhodes.com/6-coupon-mistakes-businesses-must-avoid/