I suspect this will be one of the significant weaknesses in trying to translate anything learned in a game economy into real economies. You have much better data in a game economy, but people do grow bored or decide they're just not good enough, and move on. Or people decide they've taken a stupid path and reset their account, and build from scratch. In real life, most people try to keep living even if they're at the bottom end of the economy and don't have the means to change that. This strikes me as a fundamental difference between the virtual and the real.