The #nostr protocol needs a way to cryptographically count or tally all notes.

This way it becomes possible for clients to detect forms of censorship of those that you follow. Maybe even make it visible in some way which relays “forgot” to forward a note.

See also: https://damus.io/note106rgpc2nscu4kalkgp23a9lrfacl5wwh5z9syr83n7w036np93eqxzfj2p