Exactly, it's a defining feature of the project. They don't care how you use the code as long as you use it. It's just a different philosophy.

BSDs are just doing their own thing and whether they benefit or not from others using their work is not really a concern.

Take OpenSSH, it's used by virtually every operating system and just exists to be used. It's a great contribution to software even if OpenBSD is a tiny marginal thing used by only those that need it. They are cool with that.