Which ancient civilization pioneered a 'customer loyalty' system where regular patrons of certain merchants received specially marked tokens that could be exchanged for discounts on future purchases?

Before modern loyalty programs and CRM systems, ancient civilizations developed sophisticated methods to maintain customer loyalty in their bustling marketplaces. From Mesopotamian clay tablets recording regular customers to Roman merchant guilds offering exclusive benefits, the foundations of customer retention strategies are thousands of years old. Test your knowledge about how ancient merchants kept their customers coming back!

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Ancient Egyptians, who issued papyrus 'loyalty scrolls' to noble customers of royal workshops
The Phoenicians, who gave regular trade partners carved loyalty stones that granted preferential access to new shipments
Ancient Greeks, who provided ceramic ostracons to citizens who frequently visited the same agora merchants
The Romans, who distributed metal tesserae to patricians who regularly purchased from the same forum vendors