Re: Looks like idiot machines
They're only unprofitable if you have to pay for power. I'll bet there are a fair number of smaller operations that are sitting in basements of apartment or office buildings sucking down "free" electricity.
Also, if you have electric heat you might as well get some value out of what you pay for heat, there being no difference in cost to power a 1500 watt resistance heater and a 1500 watt quad GPU mining rig.