Hello,
I am from BG.
I spoke with them. Pure scammers!!!

They are from city of Stara Zagora. I wanted to visit their office and see one of the miners working. I was explained, that only a test unit is working, but not in their office, but in some data center. And when i wanted to visit  the data center or to get some demo access to the system, they said it is all restricted and confidential.