My parents have HBO through Dish Network, so we have access to HBO Go. I decided to check it out, since I don't have a DN receiver hooked up in my room anymore.
Someone explained to me that the way movie stations like HBO, Cinemax, etc. work is that they pay for a 1 month license to show a movie. That's why they're always saying "this month on HBO" and then show that movie like 100 times. So when you get a list of every movie on just that one channel (browsing the movies on HBO Go), you see just how little there is. I watched like 3 movies, now I'm waiting for the 1st so I can check for more.