Twitalyzer, an independent research firm, measured the “influence index” by how the user shapes and contributes to conversations on Twitter. This means they count the number of times the person’s Twitter name is mentioned by other users (including retweets), not just how many followers they have.
He comes in second behind Brazilian comedian Rafinha Bastos, making him the most “influential” American.
We didn’t even know rankings like this existed, but we guess we can understand. Chad, unlike other celebs, makes a big effort to respond to much less famous people with personal messages, which Eric Peterson, the chief executive of Twitalyzer says contributes to his “influence.” SOURCE