@benjojo Clever approach to an issue that's more common than most people think, thanks for publishing the data!

Have you considered the bias of users of obscure subnets not making themselves as easily noticeable from the outside than users of common ones, though? That's to say: wouldn't somebody that actively chose to place their network on a subnet that's among the more deserted ones also be less likely to publicly expose a WD Cloud-like device instead of, for example, using a dedicated VPN to access their LAN-only NAS and thus not showing up in your scans?