Many miners like to fool themselves with faulty ROI calculations because the belief system must be upheld at all costs.

Even with a 7c/kwh rate I can say with 98% certainty you will not make a profit in fiat (which you pay your bills with) if the exchange rate stays under $550 and the diff. keeps increasing at recent rate.

The only ones making the money are the mining equipment manufacturers which run their new ASICS for 1-2 months before releasing them to the consumer or wholesaler (who may or may not also run them for a couple weeks first).

In general after mining for 2-3 months you have to sell your equipment because you usually will get more on Ebay (even after fees) than the miner can produce if kept running.