maybe you opted out in another browser/browser instance?
I wouldn't even go that far. Reason being I had disabled this option when this was first introduced. Primarily because the full screen mode sucks. Another browser is ruled out since even though I occasionally venture to other browsers for some sites, I have never logged in to any Google service from a different browser in probably more than 2 years now. This is a Google prank.
Oh wait, I am logged in to Google from my phone. And I do go to YouTube from there. I wonder if they assumed I was in the trial since I did not disable it from the phone?
i see you there are quite a lot of horror/thriller movies coming from hollywood.....................this is just the starting............we will see a lot more of them and really groundbreaking stuff in coming years. the show has just begun.