my question to you is: have you ever tried any of these strategies before? were you successful?
No, they are simply variants of the martingale, which is a strategy that has long been known not to work but that people insist on continuing to try, in some of its variants, and others continue to promote. You can be successful, but just as you can be “successful” in a casino session by being lucky or having a favorable short-term variance. As you increase your sample size, the probability of losing keeps increasing.
Every time you use the martingale system of betting the chances of winning reduces drastically, it's possible to be lucky with it and it's also possible to lose your entire bankroll constantly. Whatever variant of the martingale strategy you have also deals with doubling your losses to recover and this will always remain a failed system because in the long run you would lose more than you actually make from it. This system doesn't work well with bankroll management.