Which ancient civilization invented the world's first known retail loyalty program, offering clay tokens to repeat customers that could be exchanged for discounts on future purchases?

Before modern shopping malls and e-commerce, ancient civilizations created sophisticated retail systems that shaped commerce for millennia. From the agoras of Ancient Greece to the bazaars of Mesopotamia, retail strategies evolved to meet the needs of growing urban populations. This trivia question explores how ancient civilizations pioneered retail concepts that we still recognize today, revealing how some modern retail strategies have truly ancient origins.

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Ancient Romans with their 'tessera' loyalty system for bath houses and markets
Ancient Egyptians with their 'ankh reward' system for temple marketplace purchases
Ancient Phoenicians with their 'marked pottery shard' system for merchant loyalty
Ancient Chinese with their 'bamboo tally' system for silk road traders