The reason they are getting that much is because that many people are watching it. The cable companies have to balance price vs lost of subscribers. So there is a market pricing. In addition no one mentions that cable companies get local ad time to sell. That offsets some of the subscriber fee. So networks charge no subscriber fee but keep all ad time. The advertising is also effected with bundling. For example ESPN has a big game. A person might turn on for just that game. That more ad revenue. With out bundling that revenue is lost.
The problem is, the cable companies don't set the price. The priced is forced higher every year by networks demanding higher fees. The cable companies don't like it but in the end they accept the fees and pass them on to their customers. Comcast knows full well that as the price of extended basic gets too high, people will drop cable -- but they don't really control the price.
It amounts to third party pricing -- a little like health care. If your doctor raised prices 30% and you were paying the bill, you might shop around for another doctor. But instead that price increase just gets built into your health insurance premium and you can't do anything to stop it.
Only with a cable bill, you're not talking about a necessity. When the price of extended basic cable gets too high, you start to leak subscribers. You get cable cutters (which, for the most part is a misnomer -- young people who never had cable in the first place are not cable cutters). Young people are not paying for cable (they have grown up thinking they don't have to pay for any media) -- meanwhile at the other end, people who have subscribed to cable for 30 years are dying off.
The shrinkage is very very rapid. The most common cable networks (ESPN, TNT, Weather, CNN) are shrinking 1 percent a year or more. They're responding by trying to raise prices on remaining subscribers, which aggravates the problem.
Meanwhile, Comcast is clearly not interested in shrinking. When push comes to shove, they would rather abandon the bundle than shrink 1 or 2 percentage points a year. They'll push ESPN and TNT overboard rather than let them weigh down the whole ship.
Anyway, all I'm saying is, whether you like bundling or not, it is coming to an end. And that is going to have a big impact on sports television and sports itself.