If you’re walking around with a cellphone turned on with a SIM plugged in or Wi-Fi or Bluetooth turned on (even if not connected to anything), stores still have ways to track you. They won’t get your purchase info, but they’d know when you got there, how long you stayed, and maybe where in the store you went (if it’s big enough for multiple access points).
Meanwhile, I’ve just accepted that they’ll track me, and I’m fine if they give me a cut. Cashback and such to pay me for my data.
It’d be nice if I got paid for all the ads I see on the internet and outside.