When one of Myspaces users puts a link to a video on youtube or picture album or slideshow on photobucket Myspace doesn’t pay for the transit costs of delivering the files. You appear to be implying they do but the reality is the users are linking back to youtube or some other third party from where the files are served. In many cases, the youtube or photobucket may not even be serving these files themselves as they use CDN to ensure their content gets delivered timely and in high quality. Regardless, this situation doesn’t cost myspace any more money for transit,infact one could argue it saves them money because youtube is basically hosting and serving the files for free. The Myspace users simply link to them. Where video does cost Myspace is when their users host it on the myspace infrastructure which taxes not only bandwidth but also hardware and probably costs them somewhere around $.02 – $.05 per video to deliver.