Indeed, personalized advertising to match your psychological profile as much as possible, with just the right incentives/brain-hijacking. Then, why not just do this for all "ads" for all industries (politics is one of the most aggressive currently), and, then, why not all information one is exposed to? Let's get extreme, and look at the diplomacy-playing CICERO, that can employ strategic reasoning for how to best shape ads for you. A/B testing will becoming A/(infinity) testing until you've made a "purchase".

A further balkanization of reality.