I stopped commenting for two reasons:
1. There is no notification of new posts. I posted all over the place after the site change, but without notification I can't see if somebody replied to my post. I tried searching for the images I posted on, got tired, bored and gave up.
2. You can't see image comments when not logged in. I usually browse without being logged in (if I'm at a different computer) and if I don't see any comments, I have much less incentive to post.