Basically all current social media ends up optimizing for creating outrage, spawning mobs, less thoughtful discussion and more vitriolic arguments, etc. It's becoming a real concern to me that this is going to drive us into some kind of civil war or something if we don't find some way to check it.
Outrage-driven profit models existed before social media as such. Once known as tabloids and the guttered press, this kind of media existed a while before Facebook. William Randolph Hearst was credited with starting the Spanish-American war back in the day (as fictionalized in Citizen Kane). This is to say the "outrage complex" extends well beyond social media platforms though such platforms certainly serve to accelerate it.