Well, part of the reason it didn't work was that you couldn't post pictures in the comments until very recently! I participate in very similar threads in forums all over the internet, they would get very negative feedback if everybody posted on the exact same topic in different threads.

Some of these threads are decades old with thousands of comments, like on a craftsman website where the thread is "what did you do today". All you have to do to comment on somebody's comment is quote or partially quote the post that you're referring to.