Looks to me like it's carefully worded to be a non-binding NDA--they "ask" that you not redistribute the source, but they don't provide the code solely upon rec

Looks to me like it's carefully worded to be a non-binding NDA--they "ask" that you not redistribute the source, but they don't provide the code solely upon receipt of that promise, or threaten any penalties for it. As far as I know, it's both legal and meaningless to ask for anything you like.