Yes they are supposed to do it differently, at least if they wanted to keep me as a customer. While I use Posterous just for pushing to multiple destiantions (which it does brilliantly), I moved the primary site I was using Posterous for back to Tumblr specifically because of that campaign.

As s product manager, I've worked on switching campaigns before, but the manner in which Posterous chose to do so made me lose all faith in whether they cared about their customers or was it win at all cost.