Let me begin by making it clear that I do not, under any circumstances, read everything which is posted on Tennis Frontier. In fact, quite a bit probably gets posted without my ever reading it, for various reasons. (I sometimes worry people think I'm ignoring them because I don't reply, but it's simply because I don't see it.)
With that in mind, I'll ask how often have you ever advertised this site on Tennis Frontier? I know you've mentioned it a few times, but please feel free to mention it more often.
Also, consider putting it in your signature so that every post is sure to advertise it.