If they work off the grid for mining they'd make 10x's more profit. Because in order to make money, you have to find ways to cut the expenses out of the equation.

Also, what about cooling? Why not Hyrdogen cooling? I know, I know. That doesn't sound like a good or safe idea but do you realize how Cold that stuff is? NASA already came up with ingenuous idea of putting the hydrogen into the engines while it's fired up into their rocket engines before it even gets burnt. And it works flawlessly!

OR, you could also go the expensive route and buy Liquid Nitrogen but then you'd have to be careful of burns or over freezing parts and other things.

Mining is 1 thing, but affording the equipment and then up sizing things tend to get in the way. As the Blockchain increases so does the expenses. I think being off the grid helps the most, by having yourself on lets say a major solar panel farm you'll save THOUSANDS in energy costs, let alone you can burn as much as you want or need!

Of course, I could be just talking out my butt too but hey, whatever works out!