Which retailer's loyalty program was revolutionary for using predictive analytics to determine customer pregnancy before they announced it publicly, leading to both business success and privacy discussions?

Customer loyalty programs have evolved dramatically in the retail space, with some companies pioneering approaches that transformed industry standards. Beyond simple punch cards, modern loyalty programs leverage sophisticated data analytics, personalization, and omnichannel integration. Test your knowledge about one particular revolutionary loyalty program that changed how retailers think about customer retention and lifetime value.

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Target's Red Card and pregnancy prediction algorithm
Sephora's Beauty Insider tiered rewards system
Amazon Prime's subscription-based loyalty model
Starbucks' mobile app rewards and gamification features