@enisshkurti in slot games, symbol combinations have different values, so it's normal that sometimes you hit a set for which you get a smaller reward. π
But for example yesterday in SteemStone, one of the players received 15.1 STEEM for a bet for 0.1 STEEM, so as you wrote the game works fast and well. π
You can read about this Mega Win in this post.