I think there is anotehr thing to account for this. I may be so bold as to put forth a theory. That is that many of the non poser users are moving away from this site going to other sites where there is a better appreciation for what they do. So the poser users generally just look at poser pics so if you are not a poser user you are very likley getting less views. Just a theory.

The wit of a misplaced ex-patriot.
I cheated on my metaphysics exam by looking into the soul of the person next to me.