> Is there a good way to broadcast to Twitch, YouTube, and Reddit simultaneously?
Yes (disc: I dunno about reddit, do they have livestreams? haha I had no idea) restream.io is one service that does this, or you can configure your own nginx-rtmp
> Is it a bad idea to target multiple communities?
Probably, the way you're suggesting. Find your niche and stream on the site they use. You'll look like you're talking to nobody most of the time unless your users gather in one place. Viewers (ok, it's me) don't like it when you answer a question from someone and can't see what the question was. At least factor that in if you go down this path - re-state the question
> How expensive is it to run your own single-tenant stream on your own website?
Almost zero because nobody will watch it
> Is that a bad idea?
Not really but it might be a waste of time
> Are users revolting on Twitch against the ads and RIAA take downs?
Nah everyone else has forgotten and moved on. At the least folks don't care enough for there to be an uproar about it
> Or is it unlikely to ever be unseated?
Twitch unseated? On the heading they're on now, probably. Literally all they need to do is stop ads and push subs and they'll be locked in for generations. A single sub is worth like 2500 ad views and people gift them in 5s, 10s, 20s like it's going out of style.. what are they even doing with this ad focus? The only ads I even see are ads for Amazon Prime shows I've already watched anyway! Who's even paying for these??