Twitch also at some point included features that would allow DJs to stream as well. I suspect Bands are probably taking advantage of that as well.
I was looking into possibly DJing online, but it’s virtually impossible to do it legally and licensed now a days. I think live365 is the only provider left that will pay the fees owed Soundexchange, etc. Otherwise, one is on their own to pay directly which isn’t worth the hassle.
I guess copyright be damned these days given all the DJs streaming and people doing covers over Facebook, etc.
I did see at least one band get nailed for performing their own songs though.