Mining has not been ever as profitable as in the last six weeks or so. The diff has became flat and even went down.I am sure in the near future it will be going up and down as the whole mining industry has achieved a point of balance so depending on the price movements some mining operations are mining and selling at the same time as their margins are so narrow.
The future is in hosted mining as same cuts the time for delivery, eliminates duty tax and offers lower maintenance fees.