According to this website less that 2000 users, and to top it off, less than 100 using OS4.1!
I find this an innaccurate map
Well,
this poll shows that both OS4/MorphOS is about 1/3 compared to Amiga ("classic"), and that 54 people (of the people on this site taking part in the poll) is using OS4.
I would consider registering my Amiga's to your map, but as others already have pointed out, your map is inaccurate by design, and there are already several better maps that properly covers the *entire* Amiga scene...
