Discover Card Complaint - Fraud: Discover Card 5% Quarterly Rebate
Be warned that Discover card cheats by not always posting 5% cashback rebate on their quarterly offers. Be sure to check your account and calculate the rebate you are entitled to every month. When you call to complain, you get put on hold for thirty minutes. After several such calls, they finally acknowledged they made mistake and posted rebate. Do not assume they will automatically honor their advertisements.
This happened five times to me. I stopped using Discover; instead chase freedom credit card is much better.