So, what would you like to see happen?
Nothing. It would be nice if the low-posting underclass didn't exist, but there is no realistic way of changing the status quo. I think that this is the natural order of things, and I've accepted it for what it is. Specialized forums are almost always like this.
I just thought it worth pointing out that for all of the interest generated in this topic, we more or less treaded water for 15 pages.
Low post does not mean "underclass". It means "under exposed to the masses".
There have been many "low post" members that made big impressions. Chances are, they said something further from the center of beliefs on a topic then towards the center.
There is little more we can do to welcome all the members that join. We start a welcome thread for everyone. If someone says "hello, I'm new"; there are many here who respond and welcome them.
Anything more is really tough on this site.
Did you know that there are over 8000 forum members?
Did you know that for March, there are already 154 new members?
Those are huge numbers.