I think you received a perfectly valid answer. It was not a direct answer, but since the presupposition of your question is so deeply flawed, a direct answer is simply impossible.

However, the answer could have been more detailed and less ranting about HN. Maybe the answer could be improved to:

Things work completely different there. In particular, there are already people and companies making money with selling FreeBSD, and these are also contributing back a lot to FreeBSD. They are contributing back for moral reasons, pragmatic reasons or simply because they like FreeBSD, even though (and sometimes exactly because) they are not pushed to do so by the license.