Additionally:

  The top 1 percent of iOS game developers earn over a third
  of all that cold, digital revenue.  In contrast, the bottom
  80 percent of iOS devs are splitting a mere 3 percent of 
  all App Store game revenue between one another.

The parallel with the current state of wealth in America[1] is interesting. I feel like there is something, sociologically, to be said there but I have no idea what it is.

Put another way: "This behavior of the top 1% capturing a huge portion of the environment to themselves is mirrored in our wealth as well... why does this pattern re-occur?"

[1] http://sociology.ucsc.edu/whorulesamerica/power/wealth.html