Why do you think AMD/Nvidia are even in the mining game?
What does Nvidia get when a retailer price gouges while selling a card? Zero. NVidia would make money by selling chips to board manufacturers or selling cards directly. Do you know if NVidia has marked up its chip prices due to mining?
Its does not seem interested in selling cards directly as its store is almost always out of stock and always at sane prices (e.g. 1080ti at $699).
If it was interested in mining, it would stock up its store and mark up its prices due to high demand. Clearly that has not happened.
And would a public listed company risk investing heavily in crypto market, which faces regulatory challenges worldwide? It would an extremely adventurous move to say the least.
They're in the game whether they want it or not. NVIDIA makes the P series specifically for mining. They also acknowledge the revenue albeit as "difficult to quantify".
https://www.nasdaq.com/aspx/call-transcript.aspx?StoryId=4144915&Title=nvidia-s-nvda-ceo-jen-hsun-huang-on-q4-2018-results-earnings-call-transcriptStrong demand in the cryptocurrency market exceeded our expectations. We met some of this demand with a dedicated board in our OEM business and some was not with our gaming GPUs.
This contributed to lower than historical channel inventory levels of our gaming GPUs throughout the quarter. While the overall contribution of cryptocurrency to our business remains difficult to quantify, we believe it was a higher percentage of revenue than the prior quarter. That said, our main focus remains on our core gaming market, as cryptocurrency trends will likely remain volatile.