Welcome to Smogon! Take a moment to read the Introduction to Smogon for a run-down on everything Smogon, and make sure you take some time to read the global rules.
Well when ALL your posts are of rubbish your Value will go down, it's not just number of posts (though that does contribute). Plus if your activity rate decilnes between the times in which the market is updated, your value will also go down.
The SUMC has begun an RPG. Come join it. It's not too late to sign up. Also, you can play several games, like "I have never" and help us kill the "STUPID WEEDLE!"