How would a recommendation system rivaling YouTube's work in a decentralized fashion? We used to have web rings. We used to follow people that posted interesti

How would a recommendation system rivaling YouTube's work in a decentralized fashion? We used to have web rings. We used to follow people that posted interesting stuff and weren't too annoying, either manually or by rss. No reason it can't be done afain I think. How would they get paid by a decentralized system? By editing in a sponsor message in the film? By adding a few pngs with links to sponsors?