According to the article, they make about 0.35 cents per month from subscribers. Given 13 episodes per year, and a 30% commission that's $4.20 vs $17. I suspect that much less than 25% of AMC subscribers watch Breaking Bad given how bundling works so it can be argued that they're making more money from subscribers than from people buying on iTunes.
13 episodes is 3 months. So that $4.20 is really closer to $1. Bump it to $1.50 as a generous amount for advertising. Apply your 25% modifier and you are still at $5/season or 38c/episode.
