>GPL uses the term "Free" in a twisted, marxist way. It's restrictive and, while done in good faith, completely burns bridges and appeal to people who'd otherwise be happy contributing upstream to some projects.
I am a Marxist. Go on?
(I have my own critique of the GPL - by its nature, it demands I conform to a liberal conception of freedom. I do not consider it a freedom to have corporate entities exploit my software for profit without compensating me.)