what does close thread mean & why did I get one

I am going to ask this question again and hope I get some feedback. I don't know why I got a closed thread or even what it means.
I need some feedback. I have been working on my site for over 3 months now. I am not comfortable with what I am seeing in my advertisers stats. I show several visitors do a lot of clicking on the advertisers but I don't show anything but .70 cents in one and .65 cents in another. The advertising I do have is get paid per lead. The stats show the clicks I have gotten are uniuqe leads. Am I being ripped off? Here are the advertisers I do use. Has any one ever heard them or does anyone use them. How do you feel about these companys. 1)Sponsorship.net 2) onresponse.com (I need to let you know, 99% of my advertising is in text). I have tried the following advertisers, but I did not have success with the either. (CJ.com - LinkShare - Safe Audit - Iwin - Eads & website sponsors). These advertisers will not work with me, because I am a free site or do not meet their criteria (ValueClick - Datacom - Websponsors). Can someone please help ! What do I do ! To view my site, go to: http://www.key2free.com Thank you all.