I think the way Time determines if your influential is first they determine if you are a celebrity, and second they look at your politics and make sure it is consistent with the liberal progressive agenda. If you have both, you're in. Maybe someone should ask "who is being influenced by them?".
source: http://bigjournalism.com/wthuston/2011/04/23/time-mag-does-not-know-what-influential-means-with-top-100-most-influential-people/