The spoof cover is an increasingly popular way to establish a character. Witness the fake issue of Wired flashed on the screen during a video tribute to Iron Man's arms manufacturer, Robert Downey's character, Tony Stark. HBO rival Showtime has borrowed the technique to advertise the new season of their tentpole show, the serial-killer drama Dexter, sacrificing a little authenticity for branding impact: Dexter's name is rendered in the style of the Wired and Rolling Stone logos, but replaces the magazines' names. (One assumes these fake covers will run on the back pages of the respective magazines.) But our current favorite is the mini-issue at the back of the latest Advertising Age, a 16-page 1960s version of the ad trade mag designed to promote AMC's critically-acclaimed show Mad Men-and Initiative, the agency that organized the innovative campaign. A scan after the jump: