Okay, I didn't know that, I'm not an expert on the different adblock filters and their syntax lists etc. I just tested some different adblockers and that is the one that worked best with twitch, for me. I change my post to your suggestion that it is the "AdGuard Base filter" instead.

As my title suggests I used the uBO twitch solution (also adding the userResourcesLocation in advanced settings), but it just didn't block most ads on twitch anymore.
So I just wanted to share what helped for me. I assume the incompatible ones are ignored, so I don't see a problem. Unfortunately, I haven't found any information on which of the included filters in the uBO Filter list tab work against twitch ads.