I've watched a TV show about people who are incredibly cheap, to the extent they put their lives and health at risk. It's awful. I once watch an episode of a guy who bough meat past its due date because it was cheaper, and when he went to talk to his ex and met at a restaurant he asked the waitress if he could have the leftovers of the people who sat next to him. Just gross. He also put plastic all over his house and slept in the closet in order to keep its value intact The behavior of those people is indeed odd, but I'm not sure it's an addiction, to me it's more of a mental issue.