As the Game of Thrones season five premiere nears, viewers are quickly finding ways to watch. HBO NOW, which recently launched via Apple TV, is one way. You could also sign up for HBO via your cable company, if you have cable. Piracy is another (bad) option. Another exists in Sling, which today announce their customers are free to sign up for HBO via Sling TV this weekend, just one day ahead of the Game of Thrones season five debut this Sunday.