That site is just Flock.

The level of personal tracking is absurd.

There's a reason the supermarket wants you to use their app for "digital coupons". There's a reason they want you to scan inside the store.

As an added bonus, big-box retail has a natural immunity to external RF, which forces you to use their wifi, which can track you down to your position in a specific aisle, how much time you spend there, your path around the store, etc.

And then when you're done, they know exactly what you bought because it's linked to your store card (which is naturally linked to the app, which is tracking you around the store).

They know what cuts of meat you like just as much as they know what kind of fungal infection you have.

They know (roughly) what you decided not to get just as well as they know what you did get

They know how much time you spent calculating the best deal on paper towels (the planograms have been updated to reflect this...items that people spend a lot of time contemplating are no longer facing each other in the aisle...they are always on the same side of the aisle...you won't find PT opposite TP, you won't find dog food opposite cat food, etc...they can track your position in the aisle but not which way you face).

And that data is more valuable than the profits on the goods in your cart.

Just as one example.