During a presentation at Linux.conf.au 2010 in Wellington, LWN.net founder and kernel contributor Jonathan Corbet offered an analysis of the code contributed to the Linux kernel between December 24 2008 and January 10 2010. The Linux world makes much of its community roots, but when it comes to developing the kernel of the operating system, it's less a case of 'volunteers ahoy!' and more a case of 'where's my pay?'"
It's not clear from the article why anyone should perceive a contradiction between having high ideals and getting paid to do something you enjoy.

http://linux.slashdot.org/story/10/0...aid-Developers