Why are they not hosting it on the status.bitbucket.org server? Tt have never been down as far as I know!
It would be rather silly to host your status page on your main production infrastructure since if it goes down so does your status page.
Personally unless you're a major player I think you should always outsource your status page.
That said I cannot imagine even the most incompetent team making a change to the status page, which I would always host on completely separate infrastructure, at the same time as the rest of production infrastructure.