The admins must have been aware that the exact same crap was happening in copycat subreddits all over Reddit soon after Jailbait was shut down. Why was another campaign necessary in the first place?
I don’t think the Reddit admins can take the moral high ground here. They will only do the right thing when you threaten them with bad PR.
(I’m guessing they reacted so fast this time because they know that those kinds of things can escalate quickly and national press attention is not nice to have.)