In Ancient Rome, which demographic tracking method did marketplace merchants use to identify their most valuable repeat customers?

Before modern analytics and CRM systems, ancient civilizations had sophisticated methods for understanding their customer demographics. Marketplaces in major ancient cities weren't random collections of vendors - they were carefully organized based on deep knowledge of their clientele. Test your knowledge about how ancient merchants and empires tracked, categorized, and responded to different customer segments, influencing everything from product placement to market design.

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Tesserae loyalty tokens - small clay or metal discs given to regular customers that could be exchanged for preferential treatment or discounts
Nomen Emptor ledgers - alphabetical written records of customer purchases with household information used by elite merchants
Annulus Mercator rings - colored merchant rings that customers collected to demonstrate their shopping history with specific vendors
Tabella Fidelis tablets - wax tablets where merchants recorded customer preferences and buying patterns for premium clientele