GNU/Linux users more generous than others

There is something called the The Humble Indie Bundle #2 where you can buy a few video games for whatever price you want. These games work on MacOS, GNU/Linux and Windows, and do not have DRM though they are not Free.

Interestingly the sales statistics show that on average the GNU/Linux user will offer over two times as much of their money for the bundle.

Screenshot taken today, prices may vary with time as there are 4 more days to go.