I don't disagree, but it's really the other way around, if you have Prime it's worth getting that card and the same for these other special cases, all depending

I don't disagree, but it's really the other way around, if you have Prime it's worth getting that card and the same for these other special cases, all depending where most of your spending goes. In general cashback on cards isn't going to save you much money, but it's still nice picking up several hundred dollars worth of cashback over the course of a year.