As you read the breathless reviews of Facebook’s Q2 2014 results, remember that the entire App economy depends on a tiny group of whales who spend hundreds of dollars a month on in-App purchases. This is terrifying. Facebook’s stock price is the second derivative of in-app purchase revenue. Things are highly geared, and incredibly risky. Which isn’t to say that you can’t keep making money on $FB; just know the risks you’re running.