This probably won't be helpful.. I haven't seen an ad on twitch in years. Using ublock origin, haven't updated it in years as well, only using custom filters (the only relevant one seems to be: .amazon-adsystem.), and don't have a twitch account or any of that crap. Incognito mode with auto-nuke cookies etc. And I'm from the United States of Eurolandia without Brexitlandia. So maybe that's relevant. Anyway, I go to twitch, get a privacy warning (essentially ad preferences) every time, disable "Show me personalized ads", and done. Zero ads.