I don't know if there's an alternative platform to livestream yet but I think they will find sooner or later which they can stream gambling related streams.
You're wrong here, Twitch doesn't ban gambling streamer e.g. Drake because he's gambling on sport betting, not luck based games e.g. slots, roulette, dice etc. The problem is Twitch banning the site e.g. Stake, if Stake separate his casino site and sportsbook site, of course they will can advertise on Twitch.
What do you mean exactly with this? If Stake, as a separate entity, goes live on Twitch that is okay? Stake is a gambling entity, and it's not safe from Twitch's ban since they are a gambling platform.
I am quite surprised with the statement that stake may be able to continue streaming if the casino is separated from sportsbook when we all knew that sportsbook is a different kind of gambling which bettors bet on a certain sports and try their chance to win more money. I do agree that any gambling related site or platform is not safe from twitch banon gambling stream because of their platform becoming a haven for scammers.