Of course, like the distribution of free vs. paid, it's likely that a majority of the money is going to a minority of the paid apps (I would imagine a pretty similar 85% to 15% distribution), which means its probably working out decently for the top 15% but not so much for the rest of the developers. A substantial portion of the top apps are also likely the ones from companies like EA or branded apps like Scrabble, especially given that most of those apps go for $5-10, higher than the average sales price.