/G/PL > (((BSD)))
>Unlike the GPL, which requires you to share derivative works, the BSD license doesn’t. You can take FreeBSD code, build on it, and never give anything back. This makes it a great foundation for products — but it also means there’s little reason for companies to return their contributions.
https://freebsdfoundation.org/blog/the-report-of-my-death-was-an-exaggeration/