The content of this leak seems to be "we know where he is but will not touch him - we JUST CAN'T because of where he is". One possible motive for saying this could be to make him feel perfectly 100% safe where he is i.e. make sure he doesn't go anywhere. You can guess a motive for wanting to make sure a wanted man does not move anytime in the near future, I'm sure.
I'm not saying that's why this guy said this stuff, of course. Maybe he's just a fool, or made it up.
I don't think we're really publicizing this information to make Osama feel secure in the knowledge that we can't get to him.
I really feel that we should keep a lid on any intelligence we may have...unless this all being floated as a ruse...I tend not to think that way, though. It's just the media again.....making the news when there isn't any...I hope, in this case.