Timed-out players would be eliminated from the group altogether. It isn’t fair to give someone free wins against another person who never shows up, so the group would become a 3-player or (sadly) 2-player group in the case of multiple no-shows, and all no-shows receive an instant 0-12 for the entire round.
The rules are pretty careful to say “a score of 0” in these situations, which says that their score for the game is 0 points. The double-DQ tiebreaker has definitely happened. It stinks, but then someone wins!