So once a streamer got a deal with a casino (for sponsorship) then there is no chances for him to participate in any contests in the casinos even if the streamer want to use his own money for the contest?
I doubt they will participate when they already made a deal with a casino. The reason only because they want to get huge attraction from people who seeing they playing on that casino, so more people will be wager more on that casino because of they showed it. That's main reason of hiring a streamer IMO
For sure whenever any streamer is sponsored by casino there is contract and deal sign up between both of them in which every point is clearly mentioned as they can take actual part or not.But most of the time it's just an advertisement strategy by the casino so that more and more people join that particular casino watching their favourite YouTube streamer playing over there.Moreover they won't let that youtuber take part in any event with their free balance and if he win and let him withdraw that prize money also so that's why they have such restrictions.