Which company launched the first modern customer loyalty program in 1981 that became the model for many future retail loyalty initiatives?

Customer loyalty programs have become a cornerstone of modern retail strategy, but they have a fascinating history that dates back further than many realize. These programs revolutionized how businesses retain customers and gather valuable consumer data. This trivia question explores the origins of one of retail's most influential customer retention innovations that shaped the industry as we know it today.

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American Airlines with AAdvantage
S&H Green Stamps
Sperry & Hutchinson with their Yellow Stamps
Betty Crocker with their Points Program