Which retail loyalty program innovation first introduced the concept of 'tiered rewards' that significantly increased customer lifetime value by encouraging higher spending to reach premium status levels?

Test your knowledge about customer loyalty programs and their impact on retail customer lifetime value (CLV). In today's competitive retail environment, understanding how to build and maintain customer loyalty is crucial for sustainable business growth. The right loyalty strategy can significantly increase customer retention rates, purchase frequency, and average transaction values - all key drivers of CLV. How familiar are you with the pioneering approaches that transformed the retail loyalty landscape?

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American Airlines' AAdvantage program (1981)
Starbucks' Star Rewards system (2009)
Amazon Prime membership program (2005)
Sephora's Beauty Insider program (2007)