The daily average of posts each week has actually increased, it's just up and down more rather than being steady. There is never less than 350 posts a day, and August 6th was actually the most posts in a day ever excluding PPV days.
New members are declining though, that's obvious just by looking at the introductions section. This is because of the WW domain being used for a short period, our search rankings were obliterated and only now are we starting to recover a little. I'm working really hard on that.
If you really wanna help grow the site, take it into your own hands. You don't need to permission to rally up some members for a live discussion, you can invite your friends here any time you like, you can share threads you like to social networks (twitter and reddit help a lot). If you have suggestions, let me hear them.
I want to be more active here and I will, just as soon as I catch up with everything that needs doing. Really far behind with everything.