And yes, there certainly is the demand for it...
Since going onto the A380, I have done more HKG and SIN flights than I care to remember, and they are always full. A could have had a smattering of empty seats, mainly in WT, but never more than 15-20 out of 300 on the A380, so pretty good load factor.
Not to say that the seat revenue would be amazing, we are not privy to that.