Gossip considers those relays as both write(outbox) and read(inbox) for you.  I don't know what NDK does or what other outbox-model clients do.

I expect to see middleware that handles the outbox model relay fanout issue.... what I am calling a 'client proxy'.  You would have to trust such a service.  And Damus would be a good client to use such a service. 

 Brilliant. Thanks Mike 🫡