Which ancient civilization pioneered the first documented retail loyalty program using small clay tokens called 'symbolon' to reward repeat customers at marketplaces?

Before modern loyalty cards and digital rewards, ancient civilizations developed sophisticated methods to encourage repeat customers and build merchant loyalty. From Mesopotamian clay tokens to Roman tessera, these early loyalty systems laid the groundwork for today's retail relationships. Test your knowledge about how ancient merchants kept their customers coming back!

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Ancient Greece (5th century BCE)
Ancient Egypt (New Kingdom period)
Phoenician traders (7th century BCE)
Han Dynasty China (200 BCE)