Which retail innovation from the 1980s is widely credited as the first modern electronic loyalty program that tracked customer purchases and offered targeted rewards?

Loyalty programs have evolved significantly throughout retail history, transforming from simple punch cards to sophisticated digital ecosystems. This trivia question explores a pivotal moment in loyalty program development that changed how retailers approached customer retention. Test your knowledge of retail history and see if you can identify when this important shift in customer loyalty strategy occurred.

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American Airlines' AAdvantage frequent flyer program (1981)
Walmart's Sam's Club membership program (1983)
McDonald's Happy Meal collector cards (1979)
Sears' Discover Card rebate program (1985)