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Believing that playing on a different casino will increase your chances of winning is nothing but another gambler's fallacy. This would be true only if games on the first casino are rigged. If the games are fair (would be better if they are
provably fair) and the results are randomly generated then changing the platform will not change the odds of winning (unless they have different house edges/rtp in which case you have to opt for the one with the lower HE)
I don't think this applies to everyone, but I have personally tried it and the results were beyond expectations, I also have accounts on many gambling sites and when my luck is not good (when playing slots or dice) then I will try to play on other gambling sites and the results are satisfactory, a few weeks ago I also did that again and when playing on coinplay, I got good results.