What motive did john have in coming to post the machine and its schematics?
John outlined his future. Then he put put on the internet the tech to get there - while the capitol of research power is in the hands of darpa. He ensured, if he was true, that our government gained the power first to this tech, and early enough to conceal its existence from us. In the end of his official threads, self disclosed military and CIA persons joined the discussion.
He clearly had to know this would have happened. So then, what was his goal in that?