So gambling can bring in good income if only we can diversify the earning we generate from gambling and this is something most gamblers should have thought about, and try to work towards.
It is almost impossible to get a steady income from gambling. Casinos give more prominence to games that will bring you small gains in the short run but will make you lose in the long run. Especially if you are new to gambling and have started to profit from gambling. Everything goes great once you start winning and that's exactly what casinos want. You increase your income and continue to gamble with higher balances. Because most people think that if they try gambling long enough, they'll make a big hit.
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If you have actual evidence of a casino doing this then make an accusation against them as this is clearly a way to cheat their customers, a legitimate casino has no way to control the results the player is getting, so in theory a good start should be just a little bit less likely than a bad start, and if a casino can control this aspect by manipulating their games then it is likely that they can control the results all the time and make you lose once you bet a lot of money with them.