Comment by CaptainFever

Thanks for your work in pointing this out! Like a trademark, we have to defend this term if we want its meaning to persist.

I don't have specific sources, but to those curious, the gist is this: open source, or more accurately free software or free culture, is not about the creator. It is about affirming the rights of the user, to use the work in any way they wish, which includes selling it.

A common phrase to correct this unfortunate misconception is "free as in speech, not as in beer". The price tag is not the issue (you can actually sell free work, like by commission or by phsyical copies), the freedom of the user is. This includes the freedom to reuse the content in a commercial manner. Just about the only freedom that may be restricted is the freedom to restrict others.

You may disagree with this, but this is just the history of the free software, free culture and open source movement, which built a significant portion of the software world we have today.