Which retail loyalty program holds the Guinness World Record for 'largest loyalty program' based on active membership?

In the competitive world of retail, customer loyalty programs have become essential for retaining customers. But some loyalty programs have achieved such remarkable success that they've set world records! Test your knowledge about the most impressive loyalty program achievement ever recorded. Do you know which brand's loyalty program broke all expectations and set a world record?

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American Airlines AAdvantage (USA) with 67 million active members
Starbucks Rewards (Global) with 84 million active members
Alibaba's 88VIP (China) with 100 million active members
FlyBuys (Australia) with 12.5 million active members out of a population of just 25 million