I'm still pissed about how accepted surveillance capitalism is. In Germany there is this "payback" system where you identify at the checkout in shops and collect points you can turn into free shit. I'm still saying no every time the cashier asks me if I'm interested. I don't want anyone to datamine my shopping habits.
@Gargron here in Rio (and also in São Paulo) we have a similar system where you can opt-in to have your CPF (one of the many nation wide identification numbers) in the receipt. This gets you points which become rebates in the IRS. The idea is not to datamine the client but by adding your CPF there, you receive an instant email with the NF-e (electronic receipt) of the purchase from the government servers, this forces business to actually pay taxes as they can't hide the purchase