This is a wild take.

Space mirrors are not a new idea, they're a very old one, a staple of sci-fi only now being tested in reality.

They stated that this is a small scale demonstrator, just to test the technology. The goal would be to get some real world measurements and decide on whether it could be economical and realistic going forward.

What part of that is a scam? I would say it's perhaps overly optimistic, but it's a perfectly honest exploration of engineering.