Actually, wasn't one of the selling points of those freezer/fridge door screens that CVS or Walgreens had that they could show personalized ads based on the person standing in front of them?

We have had close so I count that as yes. About 10 or so years ago there were demos of a pi and webcam driving a smart ad display that monitors anyone walking by - gives them a unique id, guesses age sex and mood (at least) and if they look at the ad monitors for mood change and duration of attention.

Google via ASOP didn't set up wifi and Bluetooth randomization to help you remain anonymous as you walk down the street.

Instead they do so, so that they'd be the broker for that info. It's trivial to get that static info via apps, build a database, and setup scanners.

However Google has all randomized identifiers, and can link you to the same for the right price. I wonder how much they make on this front.

Knowing Google it's probably just stats, eg age, income, schooling, upcoming and past purchases, etc.

It's only a matter of time: https://www.axios.com/2022/06/30/facial-recognition-airport-...

"Detroit Metropolitan Airport is now home to a first-of-its-kind departure board that uses facial recognition tech to show travelers customized info about their flight."