No, it's you that don't seem to understand. I'm well aware that paying with your credit generates information which is repackaged and sold. But following a QR c

No, it's you that don't seem to understand. I'm well aware that paying with your credit generates information which is repackaged and sold. But following a QR code to a webpage potentially opens your phone up to cookies, tracking pixels, and all sorts of other things, depending on what permissions you give it or what exploits can be leveraged. All the major fast food vendors have their own apps now, for example. One hopes they don't exfiltrate unrelated data from the phone, but it's not a certainty and it's even less of a certainty if individual restaurants start encouraging their customers to install a generic 'my tasty meal' app.