That's patently wrong. :) I worked for the Mill for a while The Mill is as real as it gets. EDIT: No, there is no actual CPU but the software, the compiler, the simulator, etc. exist.
Where does their income come from? When is the CPU going to be released?
I haven't worked for them for a few years now but it's still a "sweat equity" organization as described on the web page under "About" at https://millcomputing.com/
They consider investments for their minimal costs as well.
I would be happy if they just released a instruction-level simulator to play around with.
It would also be super-nice if they released at least a Copper or Tin core (low-end) that can be synthesized to an FPGA for people to try out.