To piggyback on what @captcha@hexbear.net said, most significant sci-fi authors of the 60's and 70's found their mainstream audiences through Playboy (though obviously in retrospect most of what they wrote was fairly reactionary trash, but better reactionary trash than the majority of fiction that was written then), even people like Isaac Asimov wrote fiction for Playboy at one point. Otherwise they were never really known for their "journalism".