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yes, shareholders own the hardware (they paid for it - this was what the loan was for, the equipment is not rented)
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Didn't Cryptx make the loan to himself, and took shares in lieu of payment (originally to be repaid over time from mined BTC)?
Yes, so one would expect them to have an interest in reducing the running costs of the mine. Maybe they are happy just getting paid the cost for management, they may have made more via that avenue than they have/will from mining dividends.
I doubt I will get a response, but I sent them a message via facebook asking about the 75% cost for overhead.