Hopefully they do away with their terrible policies as of late.
It comes down to whether Amazon tries to do the same thing with Twitch that it does with KDP (e-books) and offer special promotion deals to those willing to sign up for an exclusivity agreement (which in this case, would mean not putting that content on You Tube or other such sites). If they don't, it's roughly equal, since given the recent changes put Twitch and You Tube makes each have distinct advantages and disadvantages. And quite a few LPers use both.
If they do, it will kill Twitch, since the change to archiving content kills revenue potential for all but the big names, the ones who can draw thousands of views during the stream itself. If they can't get the full value out of Twitch, they won't use it, and just head for greener pastures (be they You Tube or a smaller site). It's the legal equivalent of a Freemium model, and I doubt many people would go for that.
For now, it's the "wait and see" game.
Expergiscēre cras, medior quam hodie. (Awaken tomorrow, better than today.)
It's definitely better tuan if Google had bought it. At least they have competition now.
"It's so hard to be humble, knowing how great I am."