ZRH-SFO F/J awards question
I have been scouting awards from ZRH to SFO for some time in anticipation of my award booking next week.
I have noticed that the ZRH-IAD-SFO is the most readily available and the last to go. That is understandable as the IAD-SFO is in a domestic F.
However, I am puzzled by why the ZRH-LHR-SFO award is next to last to go (after the FRA 777/747 awards) and fairly easy to find.
As far as I can tell the LHR to SFO in the 777-200 has new F and J seats, yet nobody seems to want those.
Anything I am not seeing here? Any insight would be appreciated.
TIA