If someone won in a casino, he's just lucky or it was staged to gain more players.
Its mostly the first part although press stunts are not uncommon.
I mean, let's be honest, casino's and any other online gambling platforms are manipulated, there's no way they're gonna let their players win most of the time, the houses win most of the time to meet their daily bankroll needed to make their business stay alive and make huge profits.
I hope you dont mean to imply that the casino is rigging its own game. We have many vigilante like players who are using their skills to qualify and call out rigged games such that the industry remains as clean as possible. We have to thank them for keeping this sector clean and it works to prevent the scam casinos from even thinking of entering the fray.
Truth is that casino games are made in such a way that they instill confidence but are indeed not in favor of the player. Hence the latter continues to lose.