I imagine Instructables user hellboy started out looking for a subtle, understated case design to show off his single-digit Nixie tube clock called CYCLOPS. Something well-crafted but minimal, and very modern, that would highlight the function of the device while tastefully eschewing decoration for its own sake.
And then he thought: Screw that. You only live once.
I heartily approve. Moderation, as Robert Heinlein wrote, is for monks. [Thanks, Lee!]