I am presently batting 100% on op ups from Y to J in July and August. Have been flying HKG BKK quite a bit and because load factors are so high at this time of year, have yet to see the economy cabin. Also scored a two way op-up HKG NY in July for me and my wife (who has no frequent flyer status at all). As far as I am concerned, Cathay are the op-up kings. By contrast I have been op-upped once by Qantas in seven years of flying.