It's a decent concept. Not only does it provide incentive to play the game, it can reduce costs of supporting a larger nonpaying group of players online (i.e. fewer servers, faster response time, easier maintenance). However, how do you propose to disallow the nonpaying group? You can't just put copy protection on the cracked versions. The first possibility that comes to mind is using a serial key to gain online access. How do you prevent shared keys or stolen keys? It's not comparable to say a car or house where if you take loans you don't own a product but you can use it. You either pay for it and by right, own it. Or you don't pay for it and by right, should not use it. The question that arises is what's a better way to give benefits to paying customers while accepting that anyone who doesn't feel like they want those features can acquire a free copy "guilt free?"

my questions, do you always buy the games you like? how do you evaluate your decisions? how often do you consider reviews? how often do you consider whether or not reviews may NOT be biased?