They can already track you through your phone and/or credit cards. Why bother setting up a massive facial recognition system for people paying with cash when they only account for 10% (or whatever) of overall shoppers, and have less disposable income than average?
We have a major problem with “professional” thieves stealing because the big chains don’t want to pay cashiers anymore.
You see a screen with your face on it in places like Waitrose self service checkouts now. It’s their way of saying “we know who you are”.
Tracking cash purchases is just a side bonus for them.
Its harder to prove any specific stores are using any specific survailence product for marketing, but plenty of companies are offering it. Here' Samsung's take: https://web.archive.org/web/20230410052807/https://www.samsu...