A few days ago Getty Images announced the ability to directly embed their images (without watermark) in any website using their iframe which adds credits at the bottom of the image. On WordPress.com it's already been added the possibility to auto-embed the image simply adding a link to the image. Would be great to have the same here, or maybe a plugin? :)
http://en.blog.wordpress.com/2014/03/06/embed-support-getty-images/
http://en.blog.wordpress.com/2014/03/06/embed-support-getty-images/