Using Social Networks to Maximize Time on Sight

Nobody wants to use 20 different social networks and have to remember all the logens. If there's a currency that everyone accepts, that currency kind of gets a monopoly value. Everyone i want to find is on there. The a will curate all the content to show me exactly what i want to see,. But which part of me wants to see? Well, it's going to optimize based on my behavior  and how long I spend on sight. And it happens that the things that appeal to my existing biases and increase my sense of certainty in an uncertain world are more popular than those that scare me.