This is truly silly, and gives a bad name to those people who are seriously pursuing property rights in space. It should be simply laughed out of court.
There’s no legal precedent (at least in common law), or sense to grant property rights to remote unclaimed locations simply on the basis of a stated claim. If Orbdev had actually sent a spacecraft there first, they’d have a legitimate case, and I’d applaud them, but this is as likely (and perhaps more likely) to set back the cause of private property in space than to advance it.