[Marsymars]

> You do you, but I'm happy to get free airline tickets and other perks from using my credit card at the expense of....... having someone else know I bought a mechanical keyboard last month?

That's not why you're getting free airline tickets. You're getting them because you're a) subsidized by people who carry a balance and b) pay higher prices on goods to make up for the merchant fees, while being partially subsidized by those people who pay with cash and aren't getting free flights.