Originally Posted by
Kmxu
If those 11 lucky souls never checked in (within T-24 h) before UA ran the upgrade, those names would never appear on "Upgrade Standby List" of your App with a check mark (if cleared). How quickly did those seats disappear? If they disappeared gradually (one seat every hour or so), TOD was more likely. Otherwise, UA ran the upgrades for other higher status pax.
Good luck next time.
No, they weren't concealed upgrades of unchecked-in passengers as the flight status screen claimed there were 11 seats in F available and only one seat actually booked. And yes, they did vanish over time starting at T-24 down to zero available not long before departure.
Also, it appeared several in F boarded after 1Ks boarded.