The if was also interesting to me too. almost as if he published the article without that part, but immediately realized he couldnt say anything about it yet, so he edited in the hyphen and the if statement.
his tweet is also peculiar. the guy basically says "lol what if gruber has a secret mac?", and gruber seemingly implies (in my opinion) "dude thats not the case, theres an event on the 27th" .
That's the way Gruber used to leak information when he was in that game. He would do it in a cute way that made it look like nothing more than a prediction.