When starting with any affiliate program you should start with the known by the online marketers one like Click-Bank for instance to avoid becoming statistics (getting scammed)
Use Google to do a bit of research on the site and check for reviews before getting involved.
As mentioned above cost-per-action is common these days among affiliate marketing not cost-per-click.
Quote:80% of affiliate programs these days use revenue sharing or pay-per-sale (PPS) as paying method.
19% use cost-per-action (CPA).
the he rest use cost-per-click (CPC) or cost-per-mille (CPM, cost-per-estimated 1000 views)
As you see CPC is not that common and you should ask yourself why.