The more posts and the higher the, "Number of posts per day" is, then the higher this site will rank on Google and other search engines. (Same with number of members). So, it can help to have a hidden board where Staff or an Admin spams in, to raise the post count and "posts per day" score, thus raising your popularity with Google and Yahoo and the like search engines. It's good to have ten or more posts per day, so you rank higher.
Unfortunately, Fable is already known as an "RPG," so it's likely other sites that are way more popular will come up instead on engines like Google and Yahoo, and they would be way more popular than this site is right now, so that might be a dead end in advertising.
Just thought that it might be helpful to know when it comes to advertising. Best of luck!