Since when has vertical integration not been subject to antitrust laws?
https://en.wikipedia.org/wiki/United_States_v._Paramount_Pic....
https://en.wikipedia.org/wiki/United_States_v._Paramount_Pic....
http://www.ustelecom.org/news/newsletters/broadband-connecti...
http://en.wikipedia.org/wiki/Comcast_NBC_merger
(thanks for the link, interesting reading)