So one day I thought of this idea and I'll probably never get around to trying it out so I might as well tell someone I guess. Maybe people already do this but here it is anyway. So you make an image hosting site. Then to get traffic you go to the Digg images section and post in the comments mirrors to images...that just happen to be hosted on your image hosting site! So when the original image host goes down people look and see yours conveniently in the comments! Maybe it wouldn't even work but yeah there it is.