Which ancient civilization created 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 developed sophisticated retail operations to distribute goods and services. From Mesopotamian bazaars to Roman macella, retail has shaped human civilization for millennia. This trivia question explores how ancient retail operations influenced economic development and social structures in one of history's most significant commercial hubs.

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Ancient Phoenicians, who gave purple-dyed tokens to frequent buyers at their Mediterranean trading posts around 1200 BCE
Ancient Egyptians, who offered papyrus scrolls with special markings to noble customers of the royal marketplaces
Ancient Romans, who distributed bronze tessera tokens at their forum markets to patrician families
Ancient Chinese merchants of the Han Dynasty, who provided bamboo tally sticks to frequent customers at silk road trading posts