It is a fact: owners of new gTLDs do not all use their personalized domain name extension because they don't know what to do with it. They pay for it because they can.
It is also a fact that some...don't know what they bought. I went to some meetings where the people belonging to a .BRAND new gTLD did not even know that they had their own extension.
I wonder if it is the case for the .LAMER new gTLD which advertises for a .CREMEDELAMER on the frontpage of its Registry. This is a Top-Level Domain that actually does not exist.