Which ancient civilization invented the first known retail loyalty program, using clay tokens that customers could collect and redeem for discounts on future purchases?

The ancient world had sophisticated marketplace systems that laid the groundwork for modern retail. From the agoras of Greece to the forums of Rome and bazaars of Mesopotamia, ancient civilizations developed innovative approaches to commerce, store layouts, and customer engagement. This poll explores a fascinating technological innovation that revolutionized ancient retail operations and still influences modern commerce principles today.

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Mesopotamian merchants (circa 3000 BCE), who issued cylinder seals as 'preferred customer' identifiers
Ancient Egyptian traders (circa 1500 BCE), who recorded repeat customers on papyrus scrolls for royal preference
Roman shopkeepers (circa 100 CE), who distributed metal tesserae as proof of patronage at certain establishments
Chinese Han Dynasty merchants (circa 200 BCE), who used bamboo tally sticks to record regular customers' purchases