Not arguing on whether free software is or not anti-capitalist, but want to point out that the act of monetizing goods and services isn't incompatible with anti-capitalism.
Just like with "socialism", most discussions about "capitalism" are actually people with different definitions talking past each other. I'd say the important issue in economics is monopoly vs anti-monopoly not "capitalism" vs "socialism" and free software is definitely on the side of anti-monopoly.
Anyway, mixed economy all the way imho. Capitalism for small stuff, dirigism in natural monopolies.