Hmmm... Well, if there's something on the hacking fora, I'd definitely comment.
I usually keep pretty silent, though.
After all, from March 2011 until this April, I've been lurking the whole time.
Just lurking...
I don't personally care about my postcount, although it helps for the sake of actually being listened to, instead of being ignored as I see some new members are.
That's also likely how some people end up signing up and never end up passing 10 posts.
Posting is also a good way to keep in touch with others. I don't like to make useless posts, though. It makes anyone who does so look like a postcount monger. Which is probably less than favorable.