The Iron Price

While “Game of Thrones”‘ filesharing rates are probably driven in part by its appeal to the young, geeky male demographic that’s most prone to using torrent sites, HBO hasn’t helped the problem by making the show tough to watch online for the young and cable-less.
— Andy Greenburg

This sounds about right. If you don't have cable, there's no other way to watch Game of Thrones. Sorry old school, this is the way it is. See also: The Oatmeal.