I'm not sure what FOX can do about non-home games. The rights package only includes home games as far as I know (and we have three other partners in any event).All about buying power, and Duke has more of it than most anybody.
Also I think Fox might have an issue if a BE school tried to do this on any large scale. Curious how UConn is allowed, because there was an article a few months ago that Fox blocked SJU from playing in the CBS sports classic which is a major OOC.