Which ancient civilization invented the world's first known retail loyalty program, where merchants stamped clay tablets that customers could exchange for free goods?

Before modern shopping malls and e-commerce, ancient civilizations developed sophisticated retail systems that laid the groundwork for today's commerce. From the agoras of Greece to the forums of Rome and the bazaars of Mesopotamia, retail history began thousands of years ago with innovations we still use today. Test your knowledge about how our ancestors revolutionized the buying and selling experience with this ancient retail innovation trivia!

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Ancient Egyptians, who offered papyrus loyalty scrolls to regular customers of royal marketplaces
Ancient Mesopotamians, who created 'silap-galla' tokens for preferred customers at Sumerian markets
Ancient Greeks, who distributed olive wood tokens to frequent shoppers in the Athenian agora
Ancient Romans, who issued metal tessera coins as rewards for patricians who patronized certain forum shops