While I already know that post count is not a direct indicator of knowledge / experience, I used it early on to "weigh" the potential value of the post / response. Like I said, I know it is not an accurate indicator, but it was IMHO
and accurate starting point.
That being said, there is no value (at least to me) if most of the posts had nothing to do with MC or R* topics.
I feel fairly comfortable knowing the players by name (current username) but for any new user, I can see the value in post count.