If you post your order through an app or a website where you log in first, then it's not so hard for them to get financial information on you. That's why I strongly recommend against using, for example, the McDonald's app. Because they can do price fixing and you will never see it. Of course this is about grocery stores, so it takes a little more effort, but remember that they already have member cards, so all they need is a way to link those member cards to more data, and they can buy that data easily enough.

In other words, the data is already there for the taking. The question is how exactly the scam will unfold. It's going to unfold, but what will the details be? Pay attention, because it's going to happen or already is happening to you or people around you.