Intuitively, one is inclined to think these strategies would anyway work in most cases (what are the odds of failing ten times in a row??). This is however an illusion. Casinos win, in average. You can do the computation for one of your strategies. In fact, there is a mathematical theory, called "martingale theory", which proves that there is no strategy at all (no matter how complicated) that allows the player to win in average. Too bad! Then what's the point of doing maths, you may ask... Well, the longer you keep away from playing, the more you save.