I had a long article linked to bitcointalk years ago about Chinese ghost cites.
Here is the short of it there where places in China empty apartment complexes and the like.
So how about this example 10x 20 story apartments standing empty but operational. that is 200 stories with say 10 apartments or 2000 empty apartments. In the winter running gear to keep them warm is feasible.
Years ago my wife and I lived in an apartment in Astoria New York
We had a major black out everything was dark. I said to my wife lets finish the ice cream before it melts.
I opened the fridge and it worked. I said wtf I later tried to figure out how it was hot wired and what it was hot wired to. I found out it had 10 gauge wire. But never could figure out how it was hooked up.
Since it was long before bitcoin I just ran my fridge for free .
You would be surprised how much free power is out there.
I had a buddy that was a building engineer in a few malls and later in the empire state building. He had access to lots of power in nooks and crannies of those buildings. These are smaller example of mine and hold people.
One or two or three machines are not much but New York City has thousands of spots that could be doing a small operation.
So it is no longer small it is 20000 miners. who cares if it is all s9's 20,000 x 14 = 280000 th or 280 ph
these people are around. smaller than me. with my 2000 th on a 50-50 split deal. which is 1000 th for free.
they are a motorbike on the highway. I am a van.
Yeah the big fleet it 100 to 1000 full size greyhound buses.