Originally Posted by
canadiancow
There is an SFO-ORD (or vice versa, can't recall) flight on the PNR that is currently F0. Every other flight (and the Y cabin on that flight) is wide open.
Last F seat on SFO/ORD is sometimes sold for significantly less than $500, so as WineCountryUA succinctly points out UA doesn't have incentive to blink.
My counsel would be not to look a gift horse in the mouth, and certainly not to return it. Enjoy the ride.