hodlbod on Nostr: Well, I'm not sure the mechanics of the subscriber list, so I would have to know more ...

Well, I'm not sure the mechanics of the subscriber list, so I would have to know more first. Normally only list owners can add things to a list, but here it looks like people can add themselves to the list? That seems like it would be out of scope even of NIP 51. If you're using it like a normal list though, I would just pick a new 3xxxx kind that's not in use.