Which ancient cultural trading practice from the 9th century is credited with establishing the world's first customer loyalty program?

Throughout history, cultural traditions have shaped retail strategies in fascinating ways. From ancient trading routes to modern heritage-focused brands, cultural elements have been leveraged to create authentic connections with customers. This poll explores how cultural traditions have influenced retail history and strategy, testing your knowledge of this fascinating intersection between commerce and culture.

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The Song Dynasty's tea merchant 'regulars' system, where repeat customers received specially marked coins for future discounts
Roman 'tessera' tokens given to preferred customers at Mediterranean olive oil markets
The Aztec 'cacao bean credit' system for nobility at central marketplace stalls
Persian silk road 'caravan cards' that documented merchant patronage across multiple trading posts