The rest were just bought by himself/friends bait and scam investors.
If that is true, (he has come on here and denied this saying they were 'sold to investors') then he is committing fraud. That's not my view it is fact because he would be lying and then proceeding to offer more shares for sale based on that lie.
I think it can be easy for someone to get over excited and carried away by this whole new btc mining market and the potential of it. But he needs to remember that this is real money he is taking off people, the authorities see it as real money and so you need to be aware of the legalities of what you are doing. If enough shareholder complain to the SEC there will be investigations, this is all on record, everything is traceable and in the end prosecutors will decide if things need to proceed and justice will prevail.
I just think people need a shot of perspective and to realise they need to be acting in good faith and honestly at all times. That doesn't seem to be the case here, and you can only get away with that for so long before you get a knock at the door.