Another key factor: No algorithmic feed on Nostr (at least as of today). That means you only see the notes from those you follow. There are no suggested notes or suggested accounts. For this reason, follows and unfollows carry far more weight on Nostr than on other social networks
Discussion
I would say that the point carrying the most weight is that no content can be pushed artificially by an algorithm. If an algo shows you one post again and again and again, people tend to engage with it.
On nostr, if it’s not good enough to get shared over and over again, it will naturally slide in the background.