Which transportation company's loyalty program was the first to introduce the concept of 'status tiers' with progressive benefits, now a standard feature in most loyalty programs across industries?

In today's competitive transportation market, customer loyalty programs have evolved from simple punch cards to sophisticated engagement ecosystems. Airlines pioneered many of the techniques now standard across industries, but one program in particular revolutionized how transportation companies build customer relationships. Test your knowledge about this groundbreaking loyalty innovation that transformed customer retention strategies across the transportation sector.

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American Airlines' AAdvantage program (1981)
Hertz's #1 Club Gold program (1972)
United Airlines' Mileage Plus program (1983)
Amtrak's Guest Rewards program (1995)