Twitch also requires you to do a certain number of ads per hour/amount of ad time per hour in order to hit the partnership levels for decent pay. Otherwise, IIRC, Twitch puts their own ads in and the streamer doesn’t receive any revenue from the ads.
I think Thor over at Pirate Software did a video on it back when that whole “Twitch Adpocalypse” drama was happening.
Ad block software doesn’t work on Twitch anymore because they embed the ads directly into the stream.