My career has been in video games and I agree that many medium sized studios are not greedy, they probably have higher motives in general. A lot of these projects are made for love not money and stay that way. But there are types of video games that take a lot of money to be made. They would never be made for love, or by a community, because you can't run a creative project on that scale except as a business. There is no open source model for movies, novels or video games in my opinion. You can say those people making games as a business are greedy but in my experience they have pretty similar ethics to people in any business, for better or worse.