Have an upcoming YYZ-NRT flight that is now officially sold out (all Y fare classes are 0) with still plenty of room up front. Seat map shows about 30 empty Y seats on the 77W, but I imagine these are people who have not booked a seat yet.

J is about 50% full and flight is only a week and a half away... what are the chances of an op-up? Or should I get inline with an SSWU?

EDIT: Booked in S Class... so this may hurt chances.