Carapacians wouldn’t necessarily have to be exiles to play, because if they are paradox clones they don’t have any limits on what species they could be.

I mean if they’re a species chosen to play the game, yeah, but it seems like the players of the Game that are made ectobiologically always coincide, genetically, with the rest of the planet’s species, so they’d have to at least live in some sort of Exile Town made after a successful session on a planet.