brian did follow up on this as a favor to TPF, and because he was interested. In the end, we chose not to pursue this idea because the credit card companies want data in return for providing this service. We didn't feel comfortable with the amount of information they wanted on the card holders (we all get enough spam and junk mail).

Even if you're willing to sell this contact info, you need many thousands of people playing along (signing up and using their cards) to get that kind of cash. In the end, it didn't seem viable for TPF right now.