In gambling there are two categories, some are based on skills, knowledge, experience and some are based on luck. one of them is the slot machine that you mentioned here. although it all depends more on luck, that does not mean that there are no opportunities available in this luck-based game.
True, depending on our luck, slots can give us huge wins, some providers even gives 100k x multiplier of our bet. Imagine if we get lucky and hit half of that max win, we can get $50k in $1 bet.
at least, you already have a lot of experience playing in this type of slot machine gambling. at least you have an idea from your experience, if one of these slot games will suck up your money. each round has been seen since you started playing, you can stop the game or look for another game. however, most people insist on continuing to play.
But it is quite hard to determine if the slots will pay us or not since its result is random. I have an experience where I auto spin 100x, from the start-up to the 50th spin, the slots is almost dead spin, then after that it started to give me some results until I hit the bonus round giving me 1000x+ of my base bet. After all chance to win is all random in luck based game.
Likewise with other types of betting such as blackjack, baccarat, dice, if you don't use strategy, feeling and experience. in the end the table will win. you can adapt all techniques, you can apply all strategies as well as your experience. However, don't forget that you are playing a luck-based type of bet. So, the key is in yourself. if the game is giving a good spin, you can keep going. however, if the game doesn't give a spin that gives it an advantage. at least you should end the gambling session and continue later.
I think the winning point for a player is to know when to quit while winning. No matter what technique we use or strategy we implement if we do not stop when we are winning, all our funds will be eaten in the long run.