I perceive the chart they posted as very telling of how they operate through thier efforts of forecasting profitability. As I stated before system pricing is set as a function of offering just enough incentive to buy. Bitmain has continually carefully price adjusted to changing market conditions and watching the history of the S1's pricing gave insight into just how much margin there initially was and how inexpensively it could be manufactured. The take away is mining equipment is only as competitive and lucrative as the manufacturers make it and miners accept all risk of the network expanding more quickly than before. As more of these large mining operations come online that risk of more rapidly increasing becomes higher. I would prefer to be on the side of people that control this situation than out on my own at the mercy of the situation.