There is a difference between closed source and not released to public .. If he hadn't said anything about it noone would care or talk about this.
That you are an investor or miner doesn't matter , if you find it is not fair go trade something else .. there are enough coins to go around.
I just don't get the argument here , it is not a shift in a direction or another. Its a private miner he keep for himself because he did it himself .. Well big deal.
It would be something else if it went public, closed source and like taking a huge % of the stuff mined sent to him.
It is exactly the same as someone with a huge farm atm. Just a software one.