An address sign of what looks to be a hardware store can be considered wayspotable and is separate from the hardware store. Would anyone consider a hardware store a worthy wayspot?
There is a distinct separation of a sign of a thing and the thing itself.
Are they permanent?
Yes they are usually affixed to the ground
Are they distinct?
Yes they are usually placed in positions of prominence so outsiders can clearly see them and see where they are
Are they unique?
Yes, are they super wacky unique? No, but I have to assume the logical step that builders would make them unique enough to the surrounding areas that locals or passersby won’t mix up the neighborhood they’re in.
So if an address sign can be considered Unique Art (while under the exploration category) and is separate from what that sign represents then I see no reason why neighborhood signs can’t be submitted or accepted.