There were many decentralized SM networks with monetary incentive i.e., steemit almost 7 years ago, with zaps Nostr is in a better position, but still nowhere near mainstream. Monetary incentive is not enough, you still need to use external platforms like twitch, youtube, instagram, TikTok, so engagement will stay on those platforms. Are there even any decentralized video platforms? I know of dlive, which is on the fringe. Scaling will always be a problem, so as long as we don’t have data-centers in our pockets, nothing will change.