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.
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.