Can't be done simply because if you enter the auto cup scheme your paying for the games no matter what, when the game could be Fri,Sat,Sun or Mon.
What if that person could make the Saturday but not the Sunday? Then the next round is on TV on the Monday night at less than 3 weeks notice?
You can't return the seat like you can a league game.
If people are prepared to lose the money then its upto them, the club still has that money there not losing out.