Selling Random Stuff

As a tech guy, I used to walk in and almost hear an angel choir welcoming me to heaven. I walked the other day to a huge section of beds. How did they decide to start selling mattresses and all sorts of random stuff?
I recently watched a sorry YouTube “documentary” on Fry’s showing clips of how it used to be. To be honest, I think they were absolutely decimated by online sites like Amazon. The hobbyist electronic market dwindling, and the massive overhead associated with running massive brick and mortar stores.
Story credit – Reddit/[deleted]