I just had a somewhat interesting experience. I had been on a waitlist for 9 January CX872 HKG-SFO since early November. Seats were wide open back then but I was waitlisted. Eventually it was sold out. However, I got a message from CX yesterday that my upgrade was cleared. EF showed F2 A0 J0 C0 D0 I0 W0 R0 E0 Y0 ... all 0s except F2. Somehow CX found a seat for me. I wonder if the flight was so oversold with Y and PEY vacationers that they decided to clear upgrades. If they cannot get $$$, they can at least burn some of their AM liabilities. Any opinions?