IAdvertising is incredibly expensive, so much so that only big companies can afford to do it
Why pay for advertising when you can get your game on slashdot and watch the hits come rolling in? He's certainly going to get some sales out of it which is not bad for a game that's a couple of years old and arguably vastly overpriced.
"Today's robots are very primitive, capable of understanding only a few simple instructions such as 'go left', 'go right', and 'build car'." --John Sladek