https://www.twitch.tv/fossygfx I saw him win on roobet. I'm sure every casino has a withdrawal limit but that doesn't mean anything to me because I'm just a low stakes player
If they fill it with a lot of money that would be risky, they know that, so that means they must be keep filling it all the time and have someone check it constantly to make sure it is always filled. This is the kind of method that would allow you to both withdraw a lot but also withdraw constantly without interruptions as well. I believe roobet would allow you to take out whatever amount you want whenever you want with ease.