Netflix has said that they are more interested in retaining customers than acquiring new ones. People sign up, watch the stuff they can think of, then quit. I

Netflix has said that they are more interested in retaining customers than acquiring new ones. People sign up, watch the stuff they can think of, then quit. If they reliably use the recommendation algorithm, they will stay profitable much longer. If this wasn't their worry, the recommendation algorithm is counterproductive-- by giving consumers more movies to like they watch Netflix increases its own postage costs, etc.