These strategies are not new, i have also used it before, but you can't continue in this way for a long time and make profits, i believe in the end you have to come home empty-handed.
Perhaps, you could modify the strategies from time to time so you can find new strategies that could work in every time you play gambling. But yes, it is hard to depend on the same strategies for a long time because after all, we need to have the luck to win the games. The luck will not always come to us, and we are hard to detect when the luck comes.
I guess we can prevent to go home with an empty-handed by preventing to play for a long time and besides that, we can limit the money we used for playing gambling. But I don't think that every gambler can do that as when we played gambling, the tempting to continue the games will always open.