I don't spend much money on "pay-to-win" games, maybe a few bucks ($5?). But I enjoyed this game so much. They continuously updated and added online competition that also updated often so I spent quite a bit of money. I bought the premium account several times as well as other items. They updated with a new plane that's perfect for the new competition. 1 week later they obsoleted the plane with a newer plane. Too soon. Greed got the best of these developers. I quit.