Here's a demo of how you can setup a pyramid relay for you in very few steps: https://video.nostr.build/a7d6bef69b3931623ad80bec0e2e38632a03be66fc0a878c5f310703b289180e.mp4
Powerful, the paywall is.
Did you have a deliberate decision why the tree is stored not as Nostr events?
If the invites were nostr events, integrating the tree into clients or e.g. blossom server would be easier and more detached, gnocci like architecture.
We can easily turn the tree into Nostr events if there is demand for that, but I can't imagine that happening.
It works already with the Nostr-based invites that is integrated into https://flotilla.social, https://jumble.social and https://fevela.me: you get an invite code which is a Nostr event and you can later publish a Nostr event to get admitted into the relay.
You might be right, and the 13534 membership list event is enough for integrating it with external services / clients.
