oh, I had link in that post which was to another knob completely
It does not rotate, but that's not a fault of the knob, but rather a switch beneath it. You put that knob onto an encoder and that problem is solved.
It does get used as a joystick and a pushbutton. Looks like it'd work rather well with the pushbutton and joystick (using thumb) part. But perhaps not so well for rotating. A little too smooth of an outside circumference.