Another thing you could do is pay-to-play.
Our https://theforest.nostr1.com relay accepts all zap events, as those can be spammy, but so what. We can just let anyone zap and limit display of the zaps to a minimum sat amount _or_ write-access to the relay. You have to be whitelisted or pay at least 100 sats, for instance.
But, we can then allow them to include a message in the zap event (like Nostrudel does), and display that message in the feed, as a reply with a ⚡ icon or something (nostr:npub1636uujeewag8zv8593lcvdrwlymgqre6uax4anuq3y5qehqey05sl8qpl4 ?)
So, you can pay 100 sats to the pubkey, to have your comments show up, in our app.
And you can use anon zaps instead of private ones. Get away from encryption.
I don’t know if it’s possible to thread comments that are all zaps and wallets have their own rules about content length and such.
But design wise, it’s possible to go multiple ways with this. Even so far as to allow a publisher to include a min amount in the index tags and have it honored by the client.
