It makes sense for an artist creating underground work, and not getting paid for it (e.g. actually illegal graphitti artist, or some avant guarde type that works a different day job and doesn't want to "sell out" to galleries) to be against the commercialization of art.

But for programmers living off programming? Less so.

I know of two director level folks (they were promoted from being devs, but not geeky enough to read HN or dev blogs) who would repeatedly use 'open source' only as a full synonym for 'free of charge' in multiple conversations about tools and paying for them. For example when comparing software, "we need to pay for X but Y is open source".