I doubt it is about money at this point since he has been streaming under Roobet affiliate exclusively, so maybe someone can explain what is going on lately.
Its always about money and thats how they make their own living through gambling stream, why would you guys even expect gambling streamer to be loyal to only one site though? They can literally choose whatever sites that suits ( pay ) them the most. Anyway its either the 'other' site ( Stake ) gave him a better deal or probably Roobet stopped hiring him as their exclusive streamer but its probably the former.
I don't think so, Roobet was his home and he or his chat mods always banned other people who offered other casinos. Used to watch his streams on early days lately it was mess and not interesting after few scandals around his Twitch channel.