What is "demonetization"? I've never heard of this before. Does it mean YouTube stops inserting ads in your videos? As a viewer, that sounds pretty great to me. It sounds like they also stop suggesting your video to random viewers, which is understandable if they're not making money off it. Surely the real problem is that ads are toxic, the ad-supported content model is toxic, and YouTube's automatic recommendations…
YouTube deciding your video is ineligible for earning ad revenue. So the creator gets nothing (or close to nothing, not sure). I'm not sure if it actually stops running ads on the videos since I've been using an ad blocker for ages.