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.
Dlive is the other platform that I've known where they can stream. YouTube has streaming as well. But for Dlive, it's not that much users yet and viewers are still few.
So, it's like that Twitch is still the king of streaming against other streaming platforms. Facebook is also a good platform where has a lot of viewers for streamers but I don't know if they'll allow gambling contents to be viewed in their stream.
Currently, I'm still watching on the Twitch and Facebook, I've never know that Dlive its just a new thing to me, and at the same time is with the facebook right now have a restriction once they saw already a gambling related into the content like live streaming most likely they remove those but instead the streamers do is just having a cut with the edits of the streamers by that they can now easily still promote the platform they have sponsored with.