Amazon is one of the biggest online shop in the world, you can make money with it as a publisher, this free coupon for amazon is for advertisers only.
The Amazon Free Coupon Using Guide:
Voucher for US Only;
Free credit valid to March 31th, 2011;
The coupon credit used for CPC ads, there are no monthly fees or minimum spend, you are charged only when an Amazon customer clicks on your ad and is taken to your Web site.