What innovative retail analytics feature did Trajan's Market implement that made it revolutionary for ancient commerce?

Trajan's Market in ancient Rome (built around 100-110 CE) is considered by many historians to be the world's first shopping mall and a remarkable example of early retail data analytics. The complex design of this multi-level structure reveals sophisticated understanding of consumer behavior, foot traffic patterns, and retail inventory management that was ahead of its time. Test your knowledge about this ancient retail analytics wonder!

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Tiered pricing zones based on shop location and visibility within the complex
Digital transaction records using an early punch-card system
Automated inventory counting using water-powered calculation devices
Customer loyalty program with clay tokens exchangeable for discounts