Oo. I found it. "Willing to place a bet on it? You win - you're immune to any and all thrashing from the site. My call. You lose, no one is moderated for having a go at you (within reason - but with much more leniency)! Deal?" This is incredible.
I bet the Wii U would sell more than 15M LTD by the end of 2015. He bet it would sell less. I lost.