If a seat is listed on the auction thinger, yet remains unsold at the time distributions are totaled & sent
... would a seat marked for "accepting donations" continue to get donations until auction completion and the seat(s) have been transferred to the new fan?
Seats are not marked as accepting donations. Your account is. Either you accept donations for all your seats or you do not accept donations.
Either you own a seat or you do not. A seat listed on the auction is not related to ownership.
Example... You own 100 seats. You have all 100 seats listed on the auction. Some of the 100 seats maybe tied in purchase orders. But until purchase orders are confirmed YOU own all 100 seats. If I do distribution you get 100 donations for your 100 seats.