That is one of the requirements. There are more:
You must have at least 10 posts on the forum
You must have a minimum of 3,000 kills in our server(s)
You must have a ratio of at least 1:1 kills:deaths in our server(s)
You must be active in the server(s)


The posts help to show your interest in what is happening in the forums.
It lets us know your opinions about various subjects. We need to get to know you so we can find out if we would like to have in the clan or not.