Your giant space heater would make a tiny amount of money for an hour or so in the middle of the night, every once in a blue moon when a dip in demand and a spi

Your giant space heater would make a tiny amount of money for an hour or so in the middle of the night, every once in a blue moon when a dip in demand and a spike in supply happen to overlap, taking advantage of the fact that the other (oil, hydro and nuclear) power plants can't power down and back up at such short notice. If this happens all the time, it will drive the average price of power down, and power hungry industries will move there, but steel mills and aluminum smelters can't move around the country at a few minutes notice.