Using 0% APR credit cards for arbitrage? interest, something, principal, currently

kmf229

Has anyone thought of this. I've seen enough ads on TV and thought of this while doing my forwards/ futures readings last night. Why couldn't you simply purchase a 1% CD (I know rates are lower than that currently, but it's an example), and then simply pay back the credit card with the principal from the CD and keep the interest? Am I missing something here?