I think you've hit the nail on the head. I used to work for a very very large company. And they had a very strong preference for BSD licensed software, if we were building something using outside software. A few years ago, Stever Balmer and others spent a lot of time calling spreading FUD by calling Linux and GPL a "cancer". Believe it or not, that stuff had a massive impact. Not on small shops, but large company lawyers.
Over the years, Steve left Microsoft and Microsoft has become a lot more Linux friendly. And the cancer fear has subsided. But it was very very real.
On a side note, if I recall correctly, Steve Jobs wanted to use Linux for MacOS. But he had licensing concerns and called up Linus and asked him to change a few things. Linus gave him the middle finger and that is how we got MacOS with BSD.