Which ancient civilization invented the world's first recorded retail loyalty program, where merchants gave customers clay tokens that could be collected and later exchanged for discounts?

Before modern shopping malls and e-commerce, ancient civilizations developed sophisticated retail systems that laid the foundation for today's commerce. From the agoras of Greece to the forums of Rome and the bazaars of Mesopotamia, retail history stretches back thousands of years. This trivia question explores how ancient merchants created innovative shopping experiences and retail technologies that would seem surprisingly familiar to modern consumers.

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Ancient Egypt, where Pharaoh-approved merchants issued papyrus 'royal purchase scrolls'
Ancient Babylon, where shopkeepers distributed 'copper shekels' as an early form of store credit
Ancient Rome, where forum vendors distributed 'tesserae' to frequent customers
Ancient Greece, where agora merchants gave 'ostrakon tokens' to repeat buyers