OnionView, a graphical depiction of the Tor network

There are surprising number of exit nodes running on Windows 7. Home subscribers on DSL and cable connections. Isn't that rather "suicidal"?

I assumed that nearly all would be running on Linux in data centres somewhere.

An exit relay in Greenland...

Url changed from http://www.wired.com/2015/09/mapping-tors-anonymity-network-..., which points to this.