If anyone cares for their proxy links, here are they: http://milankragujevic.com/uploads/hola/?ref=hackernews
And the blog post: http://milankragujevic.com/post.php?id=72&ref=hackernews&cid...
It was only recently that they started requiring the user auth for the proxy access, earlier it was a free for all without any auth at all. Now they have the option to track which accounts are causing traffic on their network and potentially put a stop to them (not that is isn't difficult to get around)