Had my own car for the trips, but have used cabs for convenience in Chicago and NY. I usually pay cabs in cash though (probably because I never think of cabs as accepting cards, thinking by my country's norms).

None of the taxis in any major city I've been in lately take imprints either; they have the normal card-swipe machines that retail businesses have.

It's been a shift in the last few years. They're rare now.