Originally Posted by
VegasGambler
I guess, I don't consider that "cheap" from PE. But, doesn't it depend on the purchased fare class? I paid less than that ($649) for an upgrade from O on SFO-FRA (long TATL -- not much shorter than a TPAC, and more importantly, business-heavy). I saw the same deal flying FRA-SFO (O class, $649) as well, so I assume that this is a common offers on that route. They were not TOD though -- they were available as a paid upgrade right after booking.
They will adjust the offer downward when they think they can't sell the seats, but there is a floor to what they'll offer, and I am pretty sure that floor depends on your fare class (cheaper offers for higher fare classes). That was likely also at play in your R SFO-NRT / O SFO-FRA example.