Which retail loyalty innovation, first introduced in 1981, is credited with revolutionizing customer retention by offering 'miles' that could be accumulated and redeemed for rewards?

The history of retail is filled with inventions and discoveries that transformed how brands connect with customers. Among these innovations, loyalty programs stand out as game-changers in fostering brand loyalty and gathering consumer data. Test your knowledge about a revolutionary loyalty concept that fundamentally altered the retail landscape and continues to influence modern customer retention strategies.

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American Airlines' AAdvantage frequent flyer program
Sperry & Hutchinson's S&H Green Stamps
Tesco's Clubcard points system
McDonald's Monopoly promotion