It really depends on how much you pay electricity bill - if you are in Canada or other north land where you get a low temperature all months of the year you can be fine and you can still earn. BUt be careful because also the ring tend to cost more and more while the computation to resolve is getting very extreme. So choose wisely - it was supposed to be kinda fair but in the end I think only such a big cooportation or rich peolple can handle this situation. You have to spend money to get money