Hydrominer is not a scam! They already have a mining facility which is operative. On top of that, even after the ICO, every ICO participant will be able to purchase H20 tokens once their mining time ends with the same bonus that they got during ICO, up to the amount of their initial contribution. Furthermore, it has a better hashrate per $ than other mining services, you can choose what currency you want to mine, or you can leave it to the team (they use an algorithm which determines which currency is most profitable for mining currently) and of course, it is better for the environment.