Such as In many cases it makes economic sense to run an electric space heater when it is -40 C or F outside.
How many times have I pointed out that using electricity for heating is not economic. We use carbon based fuels for heating. There is an orders-of-magnitude difference in efficiency. If you are a Physicist and don't know this, I am flabbergast.
You can ignore reality if you wish. Take a pure carbon fuel such as coal. The efficiency of a coal fired power plant is upwards of 30% in some cases 40%. The efficiency of a coal fireplace as a source of heat maybe 5%. I used to live in the UK where coal was commonly used to heat homes even in the 1970's It is been phased out because it is so inefficient.
Edi 1t: Repeating the same erroneous statement over and over again does not make it correct. Here is Canada there is a large number of residences and businesses that are heated with electricity. Furthermore even if one were to use a fuel such as natural gas, it still has a cost and if that cost is displaced by the POW mining operation, this an economic advantage that only works if the mining is decentralized. All of this is basic thermodynamics.
Edit 2: You are also ignoring cooling and air conditioning costs. Setting the value of the heat produced as a by product of POW mining to zero makes zero economic sense. The heat produced has a positive or negative value that depends on the weather. It also depends on the heating needs of the miner. If one produces more heat that is needed to heat one's home then there is no or negative value on the
excess heat. This is where that small player can have high advantage since scaling to a larger POW mining operation actually increases the per unit cost.