fiatjaf on Nostr: Maybe, although I'm not sure that should be a thing currently since no one is making ...

Maybe, although I'm not sure that should be a thing currently since no one is making any money on Nostr, everybody working on Nostr clients is supposedly doing it for idealistic reasons and/or being paid by grants.

But I'm not talking about outbox now, outbox only comes up after you've decided to see or follow some specific person's notes, before that you need to discover that that person exists, and to me the only reasonable way to have that is by relying on relay feeds -- and these could be created by centralized indexers, like https://algo.utxo.one/, but if they are exposed through the relay API that makes them very easy to be reused and exchanged by other clients.