I need some advice on a cpa offer for my site

I looked at your site, and while I am not entirely sure of what a ping site does, if it attracts webmasters and bloggers (notoriously frugal individuals) you may have a hard time converting them into buyers from a simple ad. What you may want to do is build a bit of a bloggers resource guide, and create a sales page for it where the end user has to register their name to gain access or send it to them via .pdf file. The resources approach allows you to hit many more pain points for the end user. I would think you could make a few sales from hosting deals (hostgator, 1&1), domain trading/selling (Sedo, GoDaddy, etc., remember most of the people who come will own multiple domains), blog templates, link building software, anything to do with Craigslist, List management services (iContact, aWeber) or maybe Survey Software and Analytics packages.

The resources approach makes sense, particularly if you have a weekly newsletter that you can send to them that has an article or two and a video that helps bloggers make more money. So scrap the crap and start delving further into your traffic's mind to find out what they buy. Possibly set up a survey for your visitors to take (SurveyMoney is only $20 a month) and find out something about them. Remember this is a jaded group and very web savvy, so you will need to speak to them in a straightforward no BS, I tried it out and found it to be X.... sort of way.

I hope that helps.