There is a good reason why the Kardashians are incredibly successful. They are able to convince their viewers they are part of the family with their shows. I think its because you feel included since most of the show is back-and-forth gossip on family issues where its common for the people in the scene to try and find a solution to a problem where the problem person is excluded from the conversation. As a result, I think the viewer feels more welcome than even one of their family members.
Once hooked, the kardashians make bank because they can sell their fans laxative teas or hair growth gummy bears on instagram through huge ad endorsements