I hardly use a CC any more and will probably get rid of the one I have at the rate things are going.
I buy a lot of Amazon but I usually get gift cards in whatever amount at the grocery store offering fuel perks. Sometimes those fuel perks have been wonderful. Ethanol free isn’t cheap. My old stuff runs better on it when any of it runs.
I charge everything on my CC, and use the points to shop on Amazon. I’ve gotten lots of useful items at no direct cost to me.