Citi sent me a special offer letter to enroll for a 20% bonus on eligible cash back purchases with my credit card until 1/31/2011. Initially, the 20% really caught my attention. I thought it was going to be a 20% cash back on my purchases. After reading the fine print, I noticed that the 20% bonus only applies to the 1% base cash back, for a total of 1.2% cash back on the credit card. Nevertheless, an extra 0.2% cash back is still better than none.
Related: Credit Cards