1. A computer-executed method, comprising: accessing a repository comprising a first time based media event and a second time based media event; determining a first population of social media users who are aligned with the first time based media event; determining a second population of social media users who are aligned with the second time based media event; and determining an affinity score indicative of affinity by social media users for both the first and second time based media events, the affinity score based on an intersection of social media users in the first and second populations.