Cashback site befrugal.com is currently offering 8.5% cashback at Amazon.com on the categories listed below. They also have a Refer-a-Friend offer where you get $15 USD and your referred friend gets $10 USD if the referred friend earns $10 or more in cash back (not including bonuses and earnings from non-purchase activity) within 365 days of account creation.
Women's Clothing
Men's Clothing
Boys' Clothing
Girls' Clothing
Kitchen & Dining
Tools
Patio, Lawn & Garden
Hopefully we can get a referral randomiser for befrugal. My referral link is http://www.befrugal.com/referral/?ref=GBRNRBL