For the app store, developers write code without being paid and compete with each other. The corporate entity behind the competition doesn't pay the losers and takes a cut from the winners and the winners rarely make $100k/year and have no job security because the corporate entity can change the rules arbitrarily.

Or to put it another way, a tournament of 100 developers competing for five $100k/year jobs provides each developer with an expected value of $5k/year/eight_hours. That's an expected value of $612.50/hour. In terms of the App store that's like writing another FlappyBird.

Like I said, the main difference here is the lack of PR polish and the nakedness of the value proposition.