I think it is dangerous to look at this too much, there are other reasons that Linux got off to a better start not directly related to the license. Such as some

I think it is dangerous to look at this too much, there are other reasons that Linux got off to a better start not directly related to the license. Such as some rather serious lawsuits against FreeBSD in the past, that hurt adoption in the time Linux was getting up and going. But yeah it is true that Linux is much more efficient at getting stuff upstreamed, I think Sony has sent more patches to Linux than FreeBSD and the PlayStation runs on it.