If you're a part of a different PTC or traffic exchange site, you might want to advertise there... I know some people will use a PTC site just for the advertising; if they make any money from that PTC site, they just dump the profits into advertisements. You might consider getting your own blogging site (many are free), and use that site in your advertisements. That way you can really go into detail about why you like FC or strategies for earning money on FC, instead of just advertising your referral link on some PTC site. People tend to skip looking into sites if they are sent directly there, but are more willing to give it a try if the ad feels more like it is coming from some helpful person that is willing to help them get started. If your really ambitious, you can use that blog to comment about other sites that you are active with, having a separate blog page for each site. Eventually you might get a following of people that will purposefully go to your blogging site to read on the latest site that you have reviewed. If they like and believe what you have to say, they will trust you when you mention a new site, and will be eager to join under you once again. So now instead of just getting a referral for just one site, you might get a referral for all the sites you belong to.
See if you can pick OldBuddy's brain. He's been on FC for awhile, has a bunch of referrals, and has a few sites that mention FC along with some how-to videos for making money on here.