Which historic loyalty program is widely credited as the first modern frequent flyer program, inspiring retail loyalty programs globally?

Customer loyalty programs have become a staple of modern retail strategy, but they have a fascinating history dating back further than many realize. These programs evolved from simple trading stamps to sophisticated digital ecosystems that track consumer behavior and preferences. This trivia question explores a pivotal moment in the development of retail loyalty strategies that shaped how businesses approach customer retention today.

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American Airlines' AAdvantage (1981)
S&H Green Stamps (1896)
General Mills' Betty Crocker Points Program (1929)
Sperry & Hutchinson's Blue Chip Stamps (1958)