Generally spaeking as always QF will give nuttin for nuttin.(Did like tye comment during the week though that Hosties must be obeyed(when nu find one).
However as to the thread I do not think paying 700 for a 7 hour flight is great business.
If an airline has an empty seat.. you have paid your taxes, paid for your seat.All they are giving you is alittle better meal and a liitle better wine.
So if you allow say on Australia-Bangkok for this maybe at their price $10?? So