Actually the beauty of slots is that you can win big amounts even when you bet small so sometimes even though you are not betting big you can be considered a high roller when you win big. Slots has the highest house edge of all games usually so mostly I bet small too and I play slots when I am trying to hunt a big win from small amounts.

I am a high roller on sports because I know some teams and players who are certainly going on win and at times I bet big just to wager but that I do on dice and sports because it is easier to get low odds and sneak a win rather than betting big on slots and losing it all. I have seen guys rolling big on slots though at bitsler and stake so there exist people who bet big but there are very few to be honest and not everyone likes slots either.