"Stopped running the ad experience" tells me the kind of language they've been using internally to describe projects like this, and it is not language that I'm okay with from Mozilla. Using the toxic language in the retraction doesn't breed confidence that they really understand what the error was.
Then you are either a fool or extremely naive. The statement they made actually says "we expected the frog to be more used to the heat by now and will try again later when it is".