This is something that can be somewhat useful for the whales who keep going and playing regularly to the casino and even for them I am not sure if it is a good idea.Personally I love playing online casino,depositing the crypto,doing my session in slot machines which I play or enjoy sometime by betting on some sport events,I am no fan of table games although I love Texas Holdem Poker but I am no fan because I have not that much patience as needed to succeed in that kind of game.
I don't like credits but they can be useful if you badly need to avail something and you do not have a money yet on hand but I am no way of using it for gambling because we all know how risky gambling was so id say that it was a bad idea because it will help a gambler become more addicted and they will be having a hard time to pay their credit debts later on.
The second thing that you said about the games are confusing but I see that, it's all about the patience which doesn't let you continue playing poker but I think patience is also needed when we play slot games because usually, big multipliers came out after a long time of spinning or playing the game. Maybe what truly gets you in slot is its graphics and sound.