Originally Posted by
Aus_Mal
and Internationally because those who are pre-assigned exit rows (Plat/ CL) have a high chance of getting their upgrades using points granted. So they move, leaving the seat free.
Also worth adding that the exit rows on the 747 - seats A and K - are often free because of the rather large slide bussle which restricts leg-room. QF seat maps state these are some of the last seats to be allocated. My friends have had some success in asking, and getting, these at the airport at check-in.
cheers
LME FF