Not running random mid-roll ads that completely cut the audio and reduce the stream to a size that's worthless to view.
If I am subbed to a streamer, it is because I want to support them and not see ads. If you're going to run random 3 min mid-rolls on the channel ANYWAY, then I don't see the point in giving you or them my money. The current twitch advertisement model is irritating, breaks the flow of content, and is VASTLY devistating to the chat interaction of smaller streamers; especially the ones who are taking the time to kindly answer specific questions, only to be interrupted by multiple mid-roll ads they have no control over. If this isn't intended, fix it. If it is, then change it.