I wonder that the project will constantly improve its technology to compete with new projects in this field so that users after 5 years of free use will continue to trust and use at low cost?
This is a powerful community engagement strategy!
What do mean by 5 years of free use?! 5 years is a period of their contract with local suppler in their country to get free electricity (assuming this is true ) ! there is nothing free for you as user, you invest money to get return.
What they are saying, is " we will get 5 years of free electricity and 50% off for lifetime and because we don't pay for electricity, we'll make good profit from mining and share it with tokenholder ".