Originally Posted by
edealinfo12345
if United doesn't sell all the Economy plus seats (whether newly ticketed, or existing tickets for which a seat upgrade is sought, will they let anyone choose the economy plus seats for free, 24 hours from the travel date, or would they actually let the seat remain empty as a wasted empty space?
They will remain empty unless E- is overbooked, in which case some people will get free E+. The space is not wasted, as people who have earned E+ through status or paid up will have some nice extra room.