Extra 15% off applies to SALE prices only. The only down side is the postage has increased to $20 (used to be $9) but you're still able to find heaps of outdoors gears which's way a lot cheaper than oz stocks. Don't forget the 4.8% cash back from cash rewards website.
In addition, if you happen to have a card like 28 degree and you can pay your order in pound to avoid the exchange rate, however, the trick part is that you need to negotiate the shipping cost with the online chat staff (as when you pay in pound the shipping is £25 other than the $20) to £13 which roughly equals to $20.
P.S I was unable to go through the cash rewards website When I tried to pay my order in pound (I guess the god doesn't want me to take the ozbargain spirit to new extremes).
Do the savings from paying in pounds outweigh the loss of cashrewards?