Ok. Hear me out.
CRDT (Loro?) + ECS (Bevy) + the nostr = MMNRPG?
Each client would run ECS + CRDT. nostr events could be game events. Each play of the game is an event. You can spectate with read-only. You can host the "game" on a white-listed relay so only the "players" can post updates. monetization built in.