Which retail analytics system holds the Guinness World Record for the largest number of simultaneous in-store shopper movements tracked in real-time?

Retailers worldwide are using increasingly sophisticated analytics to understand customer behavior. Some retail analytics systems have broken world records for their scale and capabilities. This trivia question explores one of the most impressive retail analytics achievements that entered the record books. Test your knowledge about how far retail tracking and analytics have advanced globally!

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

Alibaba's 'City Brain' system, which tracked 2.1 million shoppers simultaneously across 14 malls during Singles' Day 2019
Amazon Go's computer vision platform, which tracked 1.8 million shoppers across 32 stores during Black Friday 2021
Walmart's SmartSense system, which tracked 1.5 million customers across 212 stores during Thanksgiving weekend 2020
Carrefour's OmniTrack system, which tracked 950,000 shoppers across 77 hypermarkets during the 2022 World Cup final weekend