Well, it gets added to your CV too. But, theoretically the company contributes back to the codebase for any enhancements they require making the code better for all users.
Yeah that's weird. I think it's partly people realizing the difference between MIT/BSD and GPL (or even AGPL) licenses. Or the diff between some ideal "how open source works" and what the licenses actually say.
This is a good thing. People may realise that the choice of license actually matters.