Stacker News is way ahead of the game in part because it is Pay-to-Post. It filters out all the noise... and the signal to noise ratio goes up, way way up imo.

If a post isn't worth 100 sats (around 7 cents?) to post and share with others... if it isn't worth 7 cents to occupy some else's time and attention then it probably isn't worth posting.

It would be a great filter for nostr in my opinion.