Is this for all Nostr clients, or just primal? It seems the client(s) is doing worse as the months drag on, woth more sign ups and better retention in May and June.  

 "Engagement" is actual interaction. Talking to people. Boosting people. Zapping people. And only real people doing it. Emoji reacts, boost bots, following people you don't care about, that isn't engagement. That's phony baloney bullshit that belongs on twitter.