A good percentage of the HR is comprised of corporate mines who don't wish to hold or speculate on BTC's future value. They're interested in one thing: fiat and I believe they cash out their earnings as soon as possible.
Unless they do ASIC design and manufacturing, or have huge discount when buying in bulk, they will not have any profit if they cash it out as soon as possible.
Those groups are precisely who I'm talking about. KnC, Bitmain, Bitfury, Cointerra, etc. They all have their own chip IP and their own farms. their cost per coin is much lower than the average miners.