Lets say you owned FlyOrDie. And your game was doing exceptionally well. 900+ - 700+ members every single day, without fail. And you had the decision to keep the game as it is or make some money out of your business. What would you have chosen? I for one would have taken any opportunity to promote my business and make money. ;)
Any way it isn't as if you
HAVE
to pay to play is it? You pay to get the opportunity to get a downloadable version, might i add is a lot better then the web browsed one ;) And to get extra/better features.