Earlier quoted context omitted.
I wouldn't necessarily say that it isn't anti-capitalist. Free software is perfectly compatible with a free market but the ethos of free software is pretty anti capitalist.
Tangent time. I genuinely don't understand what people generally mean when they use the phrase "anti-capitalist". I doubt most are Tankies or full-on Utopian Anarchists. I suspect a fair few mean "I want a mixed economy that's (a lot) fairer than the one we've got now" (which is probably my position). But outside of these three positions - what do people mean?
There's definitely a Marxist flavor to this meaning, though I don't think you have to be a tankie to use it that way.