The keyboards look janky. Why buy this over something like Das Keyboard which has mechanical keys as well and is cheaper?
Essentially every keyboard key is mechanical. Most "mechanical keyboards" are using Cherry MX or Cherry MX-like key switches.
The key switches in these are as different in design from a Cherry MX switch as a Cherry MX switch is from a rubber dome.
Because it’s a physical mechanism that has a unique feel that modern switches don’t mimic.
I like lots of keyboards and switches but this is a unique switch with deep historical roots that has been brought back to life by an enthusiast. I think it’s worth supporting (if you can afford it) on general principle.