That comparison is pretty harsh and really underemphasizes how awful sourceforge was. Myspace was mostly fine, death by feature creep. Sourceforge was a flaming pile of garbage that was poorly designed, ad laden, AND silently bundled in ad/spyware to normal downloads.
A more apt comparison would be comparing Facebook to a hypothetical social media site that when you click on a thumbnail of a user's image, you get a fullsize image of something like goatse...which thankfully doesn't exist(yet).
A more apt comparison would be comparing Facebook to a hypothetical social media site that when you click on a thumbnail of a user's image, you get a fullsize image of something like goatse...which thankfully doesn't exist(yet).