Book by 1 January 2017, travel by March 31 2017
$USD, and so I always use Citibank plus payment (no foreign exchange fees).
Note you might need to opt for PAY NOW to get the option to input promo code.
Ebates Rebate
For those who are not already aware, Ebates will also give cash reward rebates.
https://www.ozbargain.com.au/wiki/ebates_referral_links
"Sorry, your hotel isn't covered by this coupon offer". Damn