Why I don't pay for "premium" movie channels on satellite/cable

Because I've been such a great DirecTV customer, they have given me three months of Showtime for free. Now, I don't mind watching movies for free but going through my menu/guide on my DirecTV shows me why I refuse to pay for these "premium" channels.

HBO

• Chinatown (1974)
• McHale's Navy (1997)
• Teenage Mutant Ninja Turtles (1990)

CINEMAX

• Men in Black II (2002)

STARZ

• Daddy Day Care (2003)

ENCORE

• The Great Outdoors (1988)
• Fried Green Tomatoes (1991)
• Boyz N the Hood (1991)
• Fair Game (1995)
• The Sandlot (1993)

SHOWTIME

• The Rock (1996)
• Transsiberian (2008)

I think you get the point. These are the list of shows on the different channels of each "premium" channel at the exact time I was browsing.

Why would I want to pay $20, $10 or even $5 to watch movies that (1) I've probably already seen or (2) have no want to see in the first place when they came out 2-10 years or more ago!?