Rich Hickey of Clojure (http://groups.google.com/group/clojure/browse_thread/thread/...)
Matt Mackall of Mercurial, before it was acquired (http://selenic.com/pipermail/mercurial/2010-April/031543.htm...)
Matt Mackall of Mercurial, before it was acquired (http://selenic.com/pipermail/mercurial/2010-April/031543.htm...)
I tend to agree with the points that Bradley Kuhn makes in one of his blog posts [2], but I'm still trying to figure out how direct payment for time spent would work for non-obvious scenarios, like end-user desktop or mobile apps.
[1]: http://clojure.org/funding [2]: http://www.ebb.org/bkuhn/blog/2010/07/07/producing-nothing.h...