Which ancient civilization pioneered the first known form of retail 'loyalty program' where merchants stamped clay tokens for repeat customers to redeem for discounts?

Before modern shopping malls and e-commerce, ancient civilizations developed sophisticated retail and marketing systems that still influence commerce today. The earliest known marketplaces emerged as centers for trade, social gathering, and cultural exchange. How well do you know the innovative retail strategies that helped ancient merchants thrive? Test your knowledge of ancient retail history with this challenging question!

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Ancient Mesopotamia (Babylonians)
Classical Greece (Athens)
Ancient Egypt (New Kingdom)
Han Dynasty China