Credit card website — advertising direction?

Hi guys,
Can anyone provide me with any advice. I have a website that basically lists all sorts of credit cards with all the APR data and such. Truthfully, I have little (successful) experience with PPC advertising, and I was wondering if it’s even worth it to promote. I posted this thread here only because I thought PPC would be the best approach, but if any of you have advice, I’d be glad to receive it! It also doesn’t help that credit card keywords are extremely costly since it’s so popular. So should I give up on this site or go all in?
thanks, brian

Original post by AIBrian