As far as I can tell most streamers most times are, or would be, fine with having roughly 3min of ADs per hour. If it's at an predictable time they can slightly shift around to match up with their content. It's a amount of time perfect to standup, stretch drink, something and similar healthy things you really should do every hour. (You can setup twitch that way.)

But that's just 5% of ads.

And if you change that to 10% it is, as far as I can tell, already in a area where most would seriously consider leaving the platform for good and at 15% I think hardly any streamer would still be on twitch.

Lets be honest the only reason normal TV got away with 20% is because it had no alternatives, and often anyway just ran in the background.

But most funny because how few companies buy ADs on Twitch you might just end up seeing the same 3 ADs in a loop for 20 minuts. As far as I can tell at least outside of the US twitch is sometimes even incapable to run a 3-5min AD break properly due to the lack of bought ADs...