Apparently Audible already had it up and ready to go before things went south, it's possible the links went "Live" as planned simply because no one told them they couldn't, a straightforward oversight. If that is the case, it may disappear in the next day or so, at least until it can formally be released.
Well I just bought a copy from them and am wishing I hadn't. The quality of the audio is so bad even with their so-called highest quality setting that it's hurting my ears. Not to mention the annoying Yank telling me "This is Audible" every time I start it. Definitely the first and last purchase from them for me.