I'm not a lawyer either, but as I read it the rights are similar to many other User submitted content sites. They aren't required to make it easy for you to get your content off their site, and any content you leave on the site they have a free license to use on the site. However they do not claim ownership of code you may have written when used/hosted elsewhere. I find it difficult to believe that anything you write on there would be something that would take you more than 15 minutes to recreate in a local editor... but that may just be me.