oh shush........miners selling for a loss is the main way I make profit without having to mine myself 
If they sell for a loss it is in terms of their power cost. It doesn't translate into profit for others.
If they sell at a loss it means its cheaper for someone to buy then to mine, so therefore subsiding my acquisition. Yes I still take a risk that the price will have to rise, but it becomes a relative less expensive risk then paying for mining equipment and electricity.