I used to wonder on this too. It appears to be that the active blogger and forum posters make more sales, but I don't think that is so. You make more contacts and you might get a lot more looksee to your port but does that transform into more sales, I hirely doubt that. Buyers don't go reading what you write in blogs and forum, at least I don't think so.
So post this to buyers. Hey buyers, dya really give a hoot ? lol