Interesting math in the article:
By their reasoning, the top paid app in the store sells about 5k copies per day, with the number two app selling about 3k, the number three app about 2.5k, and so on. Vimov estimates that everyone in the top 100 list, when you add them all together, is making about US$304,058 on any given day. The shelf drops off from there -- in the top 1000, developers are making about $372,000, and past that, they're obviously making less.
If I read that right, here's the breakdown:
The top 100 are collectively making $304k/day and the top 1000 are making $372k/day, which means that those who are in the top 1000 but below the top 100 (the lower 900) are collectively making only $68k. Split that among 900 apps and that's $75.50 per app per day.
And then there are the other 180,000 apps. With the top 100 making $304k and the next 900 making $68k, at that dropoff rate we can expect the second best-selling 1000 apps in the AppStore to make about $17k, and the third best-selling 1000 to make about 4k.
Then it goes down from there for the other 150,000 apps, ranging from $4 per day per app down to zero.
Meanwhile, the current minimum wage in California is $8/hr. In an eight-hour day a worker with very few skills can make $64.