So, the Ethan Hass puzzles are apparently completely unrelated to the Cloverfield/1-18-08 film.
They are linked to Paramount it seems, as Paramount have had clips from the game pages pulled from YouTube. So people can be forgiven for getting so deep into that puzzle - there was a pretty solid piece of evidence.
The chap who revealed the sites to me in the first place feels 'dumb' now. I