We are in a very early R&D phase. Submit a contact form and I'll get you on the list to be notified when the Kickstarter sets off.
This is a dumb idea. Don't send them money. Home Bitcoin mining is dead, killed by increasing difficulty.
It's not even a new dumb idea. Over 30 years ago, there was the
Frenette Friction Furnace, an electric motor driving a brake. This is just the Internet-enabled version of an old scam.