I noticed that two of my recent pics had comments from people who became photo.net members the same day they commented. I'm assuming they saw my pic somewhere else (pinterest, etc) and it led them back to photo.net where they registered to comment. Am I assuming correctly? and if so, is there any way I can track who's sharing my photo elsewhere? I'm not upset about it, it would just be nice to thank the person who thought enough of your photo to share it.