<font color="blue">Do TBN members post or answer posts just to get stats </font>
Most, if not all, TBNers do not ask or answer posts just to get stats. Occasionally, people will respond with 'I agree' or repeat what someone else has posted but I think that's simply either their habit (they'd do the same thing in a conversation) or they haven't read the entire thread before replying.
However, some might start, or participate in, threads in the Related Topics forum to do this. I've always believed that posts made in the Related Topics and Photo forums should not be counted towards the total post count. This is not to say that there aren't off topic threads in the other forums or that posts in these 2 forums are not valuable, but not counting posts made in forums that are clearly non-tractor related would get the rankings closer, albeit just a little, to a reflection of the quality of posts instead of a reflection of simply the quantity of posts.