my question to you is: have you ever tried any of these strategies before? were you successful?
"they usually involve increasing the bet after a loss", Do you mean the martingale strategy? yeah, I've tried it, and it didn't work, but theoretically it is a "win-win" strategy, but then again it only works on infinite funds and no max bet amount which you or any gambler has and casinos usually have a max bet amount. so yeah, while it is a "win-win" strategy theoretically, it doesn't work practically.
Does anyone really have such capacity? No one's funds are inexhaustible, there's always a limit that everyone can take. The martingale system would always be a scam because it involves increasing your stake on each bet not knowing the outcome of the bets and if you are going to recover or lose more money. No one has anything positive to say about this strategy because it exhausts your bankroll faster