My other comments were edited since I sort of feel bad about jumping all over it... Theres normally so much sleaze associated with credit card marketing in general that it is hard not to jump on it sometimes... For starters, your plesk login page is indexed by Google. Probably not the best idea for site security.

After that if the site is to work you need to make sure you keep it really pure and unbiased. Don't allow users to submit affiliate links, put strict controls on user ratings and don't allow small groups to drastically affect the site. Inherently the site sets itself up to be abused by marketers but if you can put strict enough controls in place to keep it relatively unbiased you have the potential to create a decent resource.