> public doesn't mean the {composer,artists,...} give up their copyrights. Copyright law protects the original work of the composer and artists in your example

> public doesn't mean the {composer,artists,...} give up their copyrights. Copyright law protects the original work of the composer and artists in your example. User profile data on Linkedin is not Linkedin original work. Additionally user profiles are mostly made up of facts, which are not copyrightable.