Since its inception in the late 70s, and especially over the past ten years, ESPN "has moved aggressively into new media and platforms, without regard for how they may negatively impact the old. This strategy allows ESPN to squeeze more revenue out of any event it carries by selling that same contest in multiple formats, instead of merely broadcasting it on television." ESPN president John Skipper credits the success to a philosophy of "build, build, build. There comes a time when a lot of businesses become calcified, but we never stop building."
Original article from Bloomberg Businessweek on the mammoth, multi-platform success of the ESPN empire : http://jacobsmediablog.com/2012/09/12/sports-center/