BuddyPress.org

Yes it’s a pretty fair post, but note it’s not a conclusive treatise on the subject. It remains a damned awkward subject in many areas, good that he pointed out the possibility of split license to cover CSS / graphics if I create a graphic it remains mine unless I sign over the copyright on it same with photographers you may hire them to take a picture for you but they will retain copyright on that image for all eternity.