I can't seem to find that the 330 is on the melb-nadi route, only on the syd nadi route. 

New promotion released: From November 13 to November 30, 2014, you'll earn up to 45,000 bonus Dividend Miles® when you buy miles for yourself, or add up to 45,000 bonus miles to your purchase when you gift miles to a friend or loved one. That's a total of up to 125,000 Divide...

I received an email this morning, Us airways are offering 100% bonus points to everyone., it shows on their website without logging in as a member so I assume its available to everyone (who has been a member for 12+ days)