Aside from shortening URLs (for character limitations like in Twitter) and making them nicer to look at, what do you get from URL shorteners that you can't get from direct URLs? I'd specifically like to focus on the data/stats side.
My understanding is that there are statistics you can get from shortened URLs that are not available with direct URLs. I vaguely recall that some of them related to where (what sites) the link was posted as well as some other things.