In reply to Jeff Chandler.

Any conversation/discussion with someone well versed in the WordPress ecosystem would have pointed out the friction a non-gpl compatible license could cause. It makes more commercial sense to adopt something compatible so it's a good thing to bring awareness to this early in the game. I don't think they really had put a lot of thought into it yet, as far as the licensing goes. And they got some extra exposure out of this. You've done them a favour:)