I honestly think Rollbit is illiquid or something haha.
A guy I knew bet a few thousand on a soccer match and was literally accused of rigging the game. They would not pay him until days later and he had to literally explain why he placed the bet on a conference call with the owners. His reply was he was gambling lol
They own a sportsbook... they let people bet on sports... a lot of times they will be weird and throw a fuss. They are very dodgy but they usually do end up paying... but you have to put up a fight for no reason. I'm assuming some people just don't put up that fight, I wouldn't use them.
I personally don't think they are.
They're one of the big casino that currently [still] throws a lot in marketing. They'll stop or reduce their marketing campaigns if they're illiquid.
If I may guess, those recent approach made by casinos that happened to OP and your friend [I believe they are not the same person] was due to a recent scandal on sportsbetting that [apparently] have a significant waves of aftershoch reverberating throughout sportsbook.