No, he hasn't. That $150 isn't pure profit. Marketing, development, manufacturing, and labor costs come out of that. At 50,000 cards, we are nothing to them.
I would not say that. We are worth ramping up the production of the 6990 series or the 7xxx equivalent because "the market for the high end card is larger than pure gamers".
And that is it. Someone changing the monthly number of highest end cards that is being produced because there is additional demand.
6990s are a terrible purchase for mining, at sub $1 / Mhash in some cases. Why would they ramp up production of the 6990? Even as an already limited release speciality item, it's still in stock in some places, since there isn't enough demand to sell it out, because most people realize what a bad buy it is for mining (except for density). And again, due to economy of scale, I'm not even sure that the super high end cards are more profitable than the midrange cards, where most of the sales are made.