and they will steadily outnumber the public ones because it is so simple to run relays

ok, it took me some time to build a good one but i now use it and automatically now anyone i follow can post on it, and fetch from it, satisfying the in/outbox requirements

i have been thinking about how to open it up a bit to allow strangers to post on it, i will figure out a reasonable minimal "knock knock" scenario that means that it's open enough to allow new people in