Which ancient civilization first developed the concept of 'customer loyalty programs' by issuing clay tokens that could be exchanged for discounts on future purchases?

Before modern shopping malls and e-commerce, ancient civilizations developed sophisticated retail systems that shaped commerce for millennia. From specialized market districts to branding techniques used by ancient merchants, retail innovation has deep historical roots. Test your knowledge about how ancient civilizations pioneered retail concepts that we still use today. This question focuses on an innovative customer experience strategy used in the ancient world.

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Ancient Egyptians in the marketplace of Thebes
Mesopotamians in Babylon's central market
Ancient Greeks in the Agora of Athens
Romans in Trajan's Market complex