Which ancient civilization pioneered a proto-customer loyalty program where regular customers received clay tokens that could be exchanged for discounts on future purchases?

Throughout history, ancient civilizations developed sophisticated marketplace systems with unique consumer behaviors and loyalty mechanisms. Long before modern marketing strategies, these cultures implemented innovative approaches to maintain customer engagement and build commercial relationships. This poll tests your knowledge about how ancient societies approached what we now call 'customer loyalty programs' and consumer incentives in their commercial activities.

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Mesopotamia (specifically Babylonian merchants)
Ancient Egypt under the New Kingdom period
Classical Athens during the Golden Age
Han Dynasty China