Those big wins they do show during streems sometimes to me does look like it was planed between them and some of these casinos so I do consider them to be unrealistic because how is it that other regular gamblers find it hard to replicate on theioqn end, it's just have to be some manipulations since the casinos have got access to the back end.
It depends on games. If the casino could manipulate their operations and machineries just for a couple of people, their reputation and credibility gets questioned. But those who stream are definitely doing something to make it seem like they are profiting a lot during their time in the casino and I am sure that the casino is aware of doing that and are even encouraging or paying streamers for to manipulate the content.
Most of the streamers doesn’t manipulate their content since I follow some of gambling content streamers and they have tons of streams which they ended at loss. If you are just watching highlights will give you an impression that they are always winning.
The trick behind streamers tons of win is they are using casino balance as part of their deal that’s why they have a lot of try to play in the casino and hit a big win by consistently playing it without the risk of losing their money.
Their some rare cases that streamers becomes addicted and use their own money for bankroll but most streamers use casino funds that’s why they are persistent and fearless to gamble in daily basis.