I think there are a variety of external measures. The # of likes on the show, the critic reception, the avg rating on Netflix, the google trends for 'House of C

I think there are a variety of external measures. The # of likes on the show, the critic reception, the avg rating on Netflix, the google trends for 'House of Cards' (close to 'game of thrones' last I looked).. probably twitter activity. Could probably get a decent model out of all that.