Which retail innovation, launched in 1981, is widely considered the first modern customer loyalty program using magnetic stripe technology to track purchases?

Throughout retail history, customer loyalty programs have evolved dramatically, transforming how businesses retain customers. These programs have deep historical roots, with some pioneering approaches that changed retail forever. This trivia question explores a pivotal moment in the development of modern loyalty programs that would eventually influence data analytics, personalization, and customer retention strategies across the entire retail landscape.

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American Airlines' AAdvantage program
Sperry & Hutchinson's S&H Green Stamps
Betty Crocker's box top points program
Sears' Discover Card cashback program