Here’s a really interesting analysis of the business model for television. This article argues that affiliate fees are the most important revenue stream.
Today’s most typical cable strategy is built entirely around profit maximization utilizing affiliate fees. If you own a cable channel, your goal is to develop one or two key, hit programs, and fill the rest of the linear lineup with very inexpensive content. The “hits” make you a “must have” for any cable or satellite carrier – granting you the right to ask for fees. Too many hits drive up costs. This is why you will see more and more hit shows on the less well-known cable channels. Mad Men on AMC is a perfect example. How can a cable company not offer Mad Men? Once you nail the single channel game, you immediately try to proliferate that into multiple channels a la MTV and ESPN.