UA blocking more than half of the Polaris cabin on fairly empty PVG flights
Today's UA857 (SFO-ICN-PVG), before the flight closed, the seat map showed about 35 Polaris seats blocked, with 20+ people on the upgrade list.
The flight took off with only 2 cleared, and 17 empty Polaris seats.
The same flight on the next two days are showing 36 and 40 Polaris seats being blocked.
What could be the reason for this?