This is an argument I heard many times, including Intel instead of NVidia for ZCash too I think. But really, I doubt they would bother making graphic cards just for us miners, as they probably sell more GPUs in one week to the rest of the world than in one year to us.
I am not privy to their board room talks. But the Nvidia vs AMD fight runs deep been going on for a long time.
Zec came along and Nvidia crushes AMD at mining it. I have to think that this pleases them.
And that market cap is tiny under 80 million every once in a while they can pump it. They could also mine it more cheaply then anyone in the world.
Remember it is a way to get btc far more cheaply then any other mining method. I just can't see them not doing it.
what is it to them to have 10,000 1070's mining it at nicehash directly converted to btc then every 30 days use that btc to pump zec.
that looped effect would turn a profit costing them no real money and it would keep the price of zec boosted.
lets Do the math 10,000 gpus x 440h = 4,400,000h that is 739 btc per month and they simply buy 339 btc of zec once a month to pump the price.
the other 400 btc pays off their capital costs.
So effectively they earn a profit running that farm and use some of the profits not all just some to prop up zec.
they can do this for as long as eth is pow and zec has a low market cap.