I would argue Flickr's target audience was people who really care about photography and not social butterflies. As soon as it started to go down the toilet, the

I would argue Flickr's target audience was people who really care about photography and not social butterflies. As soon as it started to go down the toilet, the real audience left. So you're left with the social butterflies who were probably just as content with every other craptrap website at the time that would host photos. Those people will always flutter to next shiny thing with a crowd around it.