Surprised they don't do it already to be honest. Surely they could get enough bums on seats to The biggest city in Australia to make it viable.
AFF Supporters can remove this and all advertisements
If they don't have the spare planes then understandable. How many seats are they actually selling for cash on those routes though? I regularly see last minute F award seats pop up for JFK-HKG. Even see 2 seats on the same flight bookable less than a week out sometimes.