Originally Posted by
mooper
Does US hold one or more F seats past the 7-day window for long-haul flights, hoping that someone will buy it last minute, and then release it for upgrade at a later point?
Yes, they do this. It just makes business sense - why give it away if someone may buy it. I'd guess every airline does it and I have problem with it - as long as it's a reasonable number, not half the cabin, and the seats are released in the proper order before departure. I'm not convinced that US gets those two parts correct.