On the 3rd deg limitation, I don’t know how users will click and expand spread if they can’t see anything beyond 3rd degree. On gossip, I read from Mike’s note earlier that nip65 is only 1/3 of the gist - and kind-10002 is where the magic spread happens. Gonna look for rest to read.
I love this concept you designed. User motivation to curate their own Nostr experience is an important factor and a game changer in today’s social media dominant world that shapes the generation. Also “topic of interest” was a key component of Twitter - and it makes sense. I also think this would be a natural way to reduce spams as what might be spam to one, might interest another (other than the letters from the Prince :) )
PS : I’ve not checked what’s the problem with zap! But thank you for the thought !