You can probably tell roughly number (and size) of sofa, chairs, tables, shelving units in each unit. Amount of carpet vs floor space. Total floor space. That

You can probably tell roughly number (and size) of sofa, chairs, tables, shelving units in each unit. Amount of carpet vs floor space. Total floor space. That lets you build a dataset of these numbers correlated with all the other things Amazon knows about you. Then target you for ads. Maybe, it notices that your coffee table is smaller than average than other similar people/apartments. They also know you have previously bought dark colored fake wood furniture before. So they advertise dark colored coffee tables to you, in the price range you would be able to afford.