Which historical retail innovation from the 1890s is widely considered the first modern customer loyalty program that rewarded repeat purchases?

Throughout history, retail and marketing strategies have evolved dramatically, shaping consumer behavior and business practices. From ancient marketplaces to modern e-commerce platforms, the fundamentals of customer loyalty and brand positioning have deep historical roots. This trivia question explores a pivotal moment in retail history that forever changed how businesses approach customer relationship management and loyalty programs.

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S&H Green Stamps, where customers collected stamps with purchases to redeem for merchandise
The Sperry & Hutchinson Company's trading stamps program, offering catalogs of premium merchandise
The B.T. Babbitt Soap Company's premium catalog, offering merchandise in exchange for soap wrappers
Montgomery Ward's first mail-order catalog offering discounts to regular customers