Although the hit game is no longer available, more than 50 million people who downloaded it are still generating millions, or billions, of ad impressions, and Dong Nguyen is still getting paid. Don’t worry folks, Flappy Bird developer Dong Nguyen is still getting paid. Big time. Over the past few days, there’s been a global outcry in the wake of Nguyen’s seemingly inexplicable decision to stop making the game available for download. On the one…