They had already said they will license the OS too others. So the UI will not be fully open. Just tell how they make money on the OS if fully open :O Not even Google do that and they main bussiness is not OS. In Jolla case mainbussiness IS the OS. If you can deliver a solution for making money on fully open sourced OS you should send it too Jolla I am sure they are intrested in that. Too many people has no bussiness perspective in this forum and thinks like childs of fanatic Rickard Stallman. Ofcourse as much as possible shall be open but fully open is just a just as a wet teenage dream.