Which ancient civilization invented the first known retail loyalty program, where clay tokens were given to repeat customers that could be exchanged for discounts on future purchases?

Before modern retail and e-commerce, ancient civilizations had sophisticated trading networks and marketplace systems. Their supply chain management and customer experience strategies were remarkably advanced for their time. Test your knowledge about how ancient merchants built their 'brands' and managed their commercial empires thousands of years ago!

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Mesopotamians (circa 3000 BCE)
Ancient Egyptians (circa 2500 BCE)
Indus Valley traders (circa 2300 BCE)
Minoan merchants (circa 1900 BCE)