Once again on Open Source and iPhone

It has been discussed a lot recently that iPhone SDK's license agreement prohibit developers to discuss any technical details or issues related to the development. Not that I didn't know that, but a detail that was new for me (I have just never thought about it) is that open source iPhone applications are in fact completely prohibited by the license agreement: making an application open source means sharing its source code, and this is not allowed.

Another detail, or better say a comment made by someone during a discussion of why the BoxOffice (Now Playing) application has been removed from the App Store: Apple could potentially be not very excited of developers getting donations and making their apps free, as it means Apple lose its 30% by not being able to sell the application (read it here: http://forums.macrumors.com/showpost.php?p=5990223&postcount=90). Though, possibly the application has been removed due to the SDK license agreement violation (its source code is available at google code).