Thinking about myself here, nostr doesn’t do well at pushing notifications to my phone, so if it was a co-op thing (which I think would be the most potential) there would need to be some way for the other players to continue after some amount of time of inactivity from a character. This could be player defined (like decided and agreed on at the beginning of the co-op game, so that people that sometimes forget to check an app for a few days could still participate) or some way for a character to rejoin a campaign or whatever if they get kicked for inactivity