Good question. The Daddy was never intending to sell these with Amiga labels on them as the end user can do that.
X500Plus has nothing to do with teh Amiga and you can equally say that the design was inspired by the TRS-80, Dragon 32, BBC Model B, Sinclair QL, Atari ST or any other number of machines.
This is just an example of C-USA's support for the "Amiga" community of which they are no part.
Remember, The Daddy was the person who spotted that the factory photographs were fake. This is "payback".