[Useless]

Some people do add a link back to the main page or to the other gallery on their free sites. They (the extra links) don't effect the outbound link max since they are not outbound links. They serve to help surfer get to all the content half a second faster and that's probably why most of us don't use them. (Let them look around the page a bit longer before they realize they must use the back button.) As far as SEO goes, I doubt it would have any noticeable impact.