Exactly what happens on Twitch (that or a low quality version of the stream) if you use the few anti-ads that still work. And I don't mind that, if I do, I usually stop watching and move to something else... especially because their ads are even more annoying than YouTube, often multiple consecutive 30 seconds ads, unskippable. I do not know who watches these, especially when they cut something happening live.
I've never been a big consumer of Twitch, in part because I don't understand how they can decide that now you're going to forcefully miss the next minute of content.
In TV movies or YouTube, the actual content gets paused so that at least makes sense, it's just an interruption. But in Twitch it's like if they put ads in the middle of a football game! Imagine being interrupted for ads and back to players celebrating a goal.
Another thing Twitch does badly is to put ads on my face not even 30 seconds after joining a channel. Psychologically it feels like I haven't had time to get invested in the content, so it's not worth it to put up with the ads, and it makes me move somewhere else or close the tab.
On Twitch, the content creators can decide when to play an ad. They usually apologize for "having to do so", but they preferably do it at boring times in a match.
You might be in a country/region in which advertisers don't buy ads. But for quite some time now uBlock Origin isn't enough to block ads. Also if you are subbed/Twitch Prime to a streamer or have Twitch Turbo it might spare you a lot of ads too.
I have never paid a penny to Twitch, nor been given a gifted sub. So it's no that :) I know for sure my country has ads, as occasionally I load twitch app on my phone and it's unbearable.
There must be something different about how some of us are using uBlock Origin then - none o that applies to me, yet I only very rarely get ads for a day or so. I'm not even logged in to Twitch.
You might be interested in https://github.com/pixeltris/TwitchAdSolutions. A combination of its vaft uBlock script and using a VPN connected to somewhere in Austria has kept me pretty much ad-free for years.
