I don't pay interest and I don't want to on a credit card.
If I take the cash they offer - will I pay interest right away on that card?
No, it's treated as a purchase and covered by the grace period and purchase APR.
www.instant-creditcard-offers. com Credit Card Offers Guide. Apply online for MasterCard, Visa, Discover, Citibank, Chase, American Express and ...
Get $50 Cash Back Bonus with the Discover? More Card! 
Cash Back Cards: Discover Card: * -
Cash Back Cards: Discover Card: * -
Discover Card just sent me an email about my cash back reward$$$. It also link to Amazon.com. Let me fill up my shopping cart!
@ Buy via Discover card & get 5% cash back. It adds up.