Hi,
there are more similar projects like this, like IceRock mining. They promise 439% ROI per year -
https://icerockmining.io/That doesn't seem to be realistic, however why are there such a big differences in ROI calculations between Hydromined and IceRock? Is IceRock just an un-realistic scam, or is Hydrominer just less efficient?
Both are scams.
Hydrominer are liars, nadine doesn't even know how to tell the difference between Windows and Ethos but claim to be a long date miners.