And the influenced are rewarded by the influencer that is validating their polarized views.

You also might be putting too fine a point on "influencer". A relative of mine on Facebook might be a kind of "influencer"—at least with regard to his small cadre of family and friends that follow him.

You can look at it it this way, but why your small circle of family and friends would reward polarizing opinions? If anything, I have seen people losing real life relationships by not knowing when to stop in online arguments