Which transportation loyalty program was the first to introduce a tiered status system that later became the industry standard model copied by hotels, rental cars, and other travel services?

The transportation industry has seen numerous customer loyalty programs that revolutionized how travelers engage with brands. From airlines to rideshare companies, these programs have significantly impacted customer retention and brand loyalty. Some innovations have set new standards for the entire industry, while others created ripple effects across multiple sectors. Test your knowledge about one particularly influential loyalty program that changed the transportation landscape forever.

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American Airlines' AAdvantage program (1981)
United Airlines' Mileage Plus program (1982)
Delta Air Lines' SkyMiles program (1983)
British Airways' Executive Club program (1988)