Which retail innovation, introduced in 1981, is widely credited as the first modern customer loyalty program that used data tracking to reward repeat purchases?

In the world of retail, customer loyalty programs have revolutionized how brands retain customers and gather valuable consumer data. But do you know when and how this retail innovation began? Test your knowledge about the invention that changed how retailers think about customer retention forever. This question explores a pivotal moment in retail history that continues to influence product development and marketing strategies today.

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American Airlines' AAdvantage frequent flyer program
S&H Green Stamps trading program
Walmart's Discount Card program
American Express Membership Rewards