When I used to go hardcore on scratchers, years ago:
My biggest scratcher win ($3,000) was from a machine.
Many $1,000 wins were divided between counter and machine. It didn’t really seem to matter which I bought from, with limited exclusion – there were a couple stores where I knew people would play until they hit something big. They were either stores in very well-off areas where you know people would throw hundreds upon hundreds at scratchers and not even hesitate, and one local store where there was already “the lottery guy” there aside from me, so I tried to talk to him to work things out where both he and I could play without stepping on one another’s toes.