I've got to give him credit, Anonymint called this one a while back.
I think Chris deRose and Junseth have called it way before than him. It's very possible that Shelby might have even gotten the idea from them.
I don't know the exact chronology here, but 'mint's posts go back a ways, at least 2015.
https://bitcointalk.org/index.php?topic=1218269.0That said, his views on the issue have been all over the map over time, which is maybe fair since it has been an evolving environment.