Apparently, it will be soon available at Amazon, but for now you can buy it here. The money would go to Lydia Pintscher, who has been actively involved in FOSS since 1990, and in recent years KDE. So pretty sure it will get poured into OSS development.
IMHO though, it would probably just be better to directly send donations, bug reports and patches to your favourite open source projects.
I you expect me to believe that Lydia Pintcher has been involved in FOSS since she was 5 or 6 years old? http://www.lydiapintscher.de/about.php