I like this solution. Basically, clients would send the users’ kind 10002 event to *all known relays*, while only sending the note itself to the relays the user is connected to.

On the flip side, the client would then be able to pull in that 10002 event data from any of the relays a user is connected to, and know what relay to get another users posts from.

“It is suggested that people spread their kind 10002 events to many relays, but write their normal feed-related events to a much smaller number of relays (between 2 to 6 relays).”