https://github.com/uBlockOrigin/uAssets/issues/5184#issuecomment-1829172308

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.