I have seen many websites offering "Lifetime" contracts on cloud mining hashrate. Most ROI calculators that I have come across appear to indicate that these contracts will lose profitability in around 20-30 weeks, so less than a year. Am I looking at this wrong, or are these contracts actually just that much of a scam?
maybe what they mean about lifetime contracts is as long as they can operate the company then you can still mining with them but if somehow they are shutdown their services in just 6 month then they are only scam you. i have seen this is the past and there are many cloud mining offering "lifetime" like you said but the fact is after they operate in just one year or less, they are run away with the money and people getting sad. for example, in genesis mining, i can reach the ROI in just 9 month with small hashrate and i am sure this will happen too with the big hashrate. in hashnest, the ROI is almost equal with genesis mining. but in the other places, maybe they can guarantee that the ROI can be reach in 4 month but i think its difficult to reach ROI in short of term.