I bought 3 bottles of yellowtail wine today, and attached on the bottleneck was a promotion for obtaining a $20 voucher to spend at the iconic. Here is the link again: yellowtailwine.com/theiconic
I would have thought you would need to verify your purchase or whatever before you could claim it, but you just need to enter some details and they send you a code via email. There is no minimum spend that I know of, I bought $21 worth of clothes, used the coupon and only paid ~$9 including shipping.
Here is a screenshot of my purchase (sock were only thing close to 6 bucks): http://i.imgur.com/W4csfn2.png
EDIT: Plus, you get an entry into some sort of competition. I haven't tried it again, please post if it works for you.