So, the combo WebKit with WebCore and JavascriptCore is LGPL, not BSD.
The only reason to contribute to a BSD project is when you dominate the segment, like Apple does with WebKit browsers, and you want more companies to feed around your ecosystem increasing its value for you.
Don't assume Steve Jobs does it out of his good heart. The OPENSTEP OS was one of the more closed (as in "doesn't play well with others") Unix variants of its time.
The only reason to contribute to a BSD project is when you dominate the segment, like Apple does with WebKit browsers, and you want more companies to feed around your ecosystem increasing its value for you.
Don't assume Steve Jobs does it out of his good heart. The OPENSTEP OS was one of the more closed (as in "doesn't play well with others") Unix variants of its time.