Problem with hulu / amazon etc is that it requires high speed internet … not all areas of the country have access. Some people can not or do not want to pay premium $$$$ for entertainment; they still like free broadcast TV. ($100 per month; $1200 would buy a lot of stuff like meds, heat and food.) I never have time to watch more than 6 hours of TV in a week.
My original thought was they are missing their chance to bring in new people to the show. DVD buyers will be fans who want to be able to watch the show and catch up with what they missed. How many DVDs will they sell to people who have never seen the show? Re runs help hook new viewers in who want to watch something they have not seen before.