It's interesting to me that others feel they have a handle on how much it costs to run an App Store. Consider the backend: data center, computers, power, cooling, maintenance, code reviews, etc.
There's a cost associated with the App Store and then of course there's some revenue that should be associated with it too. Is Apple just supposed to eat the cost? Give me a fricking break.
What I hear is "Man, Apple makes a ton of money... I wish I had some of that... and since I don't, I'm going to bitch about it in the press and litigate it in the courts..."