The problem with Groen products is that the company has no money [subject to this supposed Chinese interest] so everything they present is 'What if...?'
It has been like that for a long time and they are therefore just one of dozens of companies across the world producing paper aeroplanes for the ephemera market.... and the autogyro industry has more than its fair share.
The favourite ploy is to design something really smart and stick POLICE signs on it..... as if that makes them work much better!