Twitch is a dangerous website, the extension probably won't be back. They could still easily target you at any time and you are just lucky they are sending ads. After some time of using the extension twitch will react and become even more toxic.
Twitch even has a network sniffer in its source code (among other things), its so much worse than just ads, some of these experiments are basically malware/pup that no-one would install on their device willingly, these instances aren't just left over code from some library they are deliberately crafted experiments that are present in the active code path.
Forgive me if I wait for more concrete evidence than the word of a guy who refuses to cite his sources because he thinks Twitch is in collusion with the US Government and he may be thrown in jail or disappeared for doing a write up on some publicly available source code.
I doubt it’s just SEO… The fact that his first attempt at the comment was deleted by uBlock’s team and that his claim to be the developer of a now pulled Twitch adblock extension makes this interesting
This is only worth paying attention to if someone can say how they not only escaped the browser sandbox but then called native, privileged code. Javascript running in the browser cannot just do that.
I mean they can watch and monitor your activity on their website, and are probably partnered with many other websites to collate data on your interests and beliefs to feed into a chunky advertising algorithm sooooo...
We all know that to a degree, but do you really think they're in collusion with the US government to jail anyone who mentions it?
I also don't think the dude gave anywhere near enough information to explain why search engines and browsers should be blocking access to Twitch. They made a lot of claims, but no proof.