Originally Posted by
Frogbone
Next you will see that UG's that cleared at -5 Days will be yanked and sold if someone wants to buy an F seat between then and departure. There's no difference.
This has happened to me. Upgraded a couple days before departure, got to the point where I was in line to board and got called over to have my upgrade revoked because "another passenger is in full F." Said passenger standing there at the desk. The GA was very apologetic since the only seats left were middle seats in the back versus the C+ seat I had originally reserved. I got some miles for my trouble.