It is giving the vibe of being a "pay-to-win" game. lol
Personally, I have never had a max win on a regular spin before, and even the few bonuses I bought didn't get me that win. Now that I have basically cut my slot games to almost zero, it has reduced the possibility of me winning that max with a regular spin unless I am luckier than I have ever been.
I understand what you mean, but I don't think we can call it as "pay-to-win" game. Because, there is no guarantee someone will get lucky (win) when paying for spins on slots, including those that aren't regular spins, or those that directly purchase free spins (features).
Well, luck in slots is truly a mystery. There are so many possibilities, whether it is a big win very quickly, or extraordinary luck that only lasts a short time. I think anything can happen in gambling, especially in slots. I think I am one of those players who has had these experiences, but honestly, I have never had an extraordinary win with just regular spins.