i'm not sure if designing the mostr.pub ActivityPub/Nostr bridge as a Nostr relay was the best decision, because it's basically invisible unless you add it to your Nostr client, and most people aren't doing that.
on the other hand, designing it as a Nostr client that broadcasts to popular relays could have issues, because it might get resource limited if there is enough traffic.
i can solve this problem for one person (me) by setting up a bot that subscribes to my bridged mostr.pub accounts and rebroadcasts to other relays.