"Under tournament conditions" is the condition everyone forgets. Go AIs were competing with ranked players given handicaps of varying degrees of absurdity.
I'm a heavy ad blocker user, and I have never needed to whitelist anything myself. All the adblock lists I've ever used consciously avoid anything so generic it'd catch ad_main.js on J. Random Website. (Hell, if anything they undercatch—I have several rules for things which are ads and aren't blocked.)