Why would someone go to fox news? Just from an informational standpoint, the info you get here is an order of magnitude higher in content and value than what you get at fox news.
A far more relevant question is why Free Republic doesn't have a larger share with accompanying political influence. Eventually somebody will realize that the nut-jobs that are allowed to post here are not furthering FR's goals, but just alienating moderates who are the pivotal group in most elections. Same with all the lonely heart types who use this forum as a chat room and just dilute the serious posts, essays and true conservative messages.