From what I have experienced in any casino including casinopunk which I played some time ago. betting at $0.2 either when getting a free spin bonus or buying it never gets a profit above $10. Either I'm unlucky or the provider I play is not that good. Usually the PragmaticPlay provider is my favorite but in the future maybe I need to move around a bit to try whether $0.2 from buy spin exceeds $ 10 or not.
Well, my experience in any online crypto casino, is the opposite of yours. I'm not saying that I always won or hit a big multiplier, but I also don't win only $10 every time that I use a free spin or a buying a bonus feature. The biggest hit that I recalled with a $0.20 bet was in Pragmatic games and it was around $256. I guess that either you need to change a game or probably focus on one and see how far you will go. Ofc you can try other providers like Hacksaw and NoLimits, but from my experience, both of them need more bankroll than Pragmatic to get something big.