Which bits are not functional? I'm using their email and calendar.. they aren't completely polished, but they're very usable.
Not trying to tell you what do do (I bet there's heaps of people that would see it the same way as you)
But it seems kind of odd that people are happy to give a background check to a corporate employer who doesn't give shit about them (and who they don't care about or feel any responsibility towards), but wouldn't do the same for a community org position that necessarily involves more responsibility to the broader community.
Write intentionally badly. Don't care about quality, only care about getting the content finished. Once it's done, you can edit for quality, or re-write some parts, but you'll also probably find that you are happier with it than you expected.