Which AI-powered retail technology has been most widely adopted in major league sports stadiums to reduce checkout lines and increase merchandise sales?

Modern sports stadiums are implementing advanced technologies to transform the fan shopping experience. These innovations are changing how merchandise is sold, how fans interact with products, and how retailers understand consumer behavior during sporting events. This trivia question tests your knowledge of cutting-edge retail AI implementations in major sports venues around the world.

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Computer vision-based autonomous checkout systems that allow fans to grab items and walk out without scanning
RFID-tagged merchandise that automatically bills season ticket holders when they exit the stadium with new purchases
Blockchain-verified digital collectibles that replace physical merchandise entirely
Biometric payment systems that identify fans by facial recognition and charge their stored payment methods