It is not necessary that each and every person who comes at your site always click your advt. It was happen with me when about 400 to 500 impression appear but none of amount i received from it.
You posted 230 posts only in this month. means more than 15 posts a day. Thats really good work. Instead of giving direct links to full downloads, you can give hints to users telling how to download full versions. Which makes your site legal and not a warez site. If all of your traffic is from search engines, then wait for few more days. And if it is from sites like this site, then its common that you dont get clicks. From this thread u might got atleast few hundreds of impressions but i dont think that any of these persons clicked on your ads.
Just like you can train them to search effectively using quotes, or intext: or site: etc., in search strings. Or train them downloading from torrents or from any p2p clients. One thing is, if a BASIC level user is coming to ur site means, its because of your description of the software you gave in ur site not because of rapidshare links. Those who comes coz of RS links might be knowing things well and have very fair chance of clicking on ads.