I'm pretty sure Nvidia aren't the only ones "milking" in this industry, I hate that term anyway. It's just business, if a company can produce several products for a relatively low cost from the "same line" that lots of people will buy then of course they will profit from it and continue to do so. And who can blame them really? They aren't charities...
All their PR shouts about pushing tech forward, innovation blah blah blah.