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!
They could probably abandon the outdated hardware and move to some other country where there's free electricity too and extend the time
It is possible but moving from that country to another and setting up new hardware will cost them a lot. Also if they will abandon the hardware then maybe there is still a possibility that they will abandon this project?