RE:RE:RE:DMG Blockchain Signs 7 Megawatt Bitcoin Mining ContractSo let's assume they might be charging $0.07 per kw/h - that equates to $80 per rig per month ($960 per year) Their margin from that will be around 20% max so you'll be looking at around $118k profit per MW per annum.
You numbers are way off on the 20% margin. Their rate for power is at least $0.06 for power. Then they have to pay for their employees and other fees such as property taxes, internet, security system etc. No way does this even put a dent into paying down the $5M of infastructure they just installed. Even your hyper promotional number of $118K profit per year per MW is not enough to pay all the head office salaries and public company filing fees.