said by PhoenixDown :

Just because the distribution platform from the traditional broadcast model to an online platform doesn't necessarily mean that its unprofitable.

a) There is nothing that stops a studio from placing ads either prior to a show or in the middle (ala commericals) like they do today. Yeah some guy can rip the movie and take them out but who would really bother going through the trouble of downloading it off of torrent when you can get it faster and easier with the commericials from the official site?