You know rough dimensions you don’t have a robot going through and literally mapping every item on the floor, high traffic areas , details about amount of people that live there, possible pets, and then tying it to your IP and then selling that to advertisers. The crazy thing isn’t that they do that it’s that you have to pay money for an item that then does that without your permission and if you attempt to stop it they brick your item that you paid hundreds of dollars for I don’t know for certain if they sell your data (but they probably do) but you can use a wifi router and how it reflects in a room you can fully map a room with enough accuracy that you can tell what a person is typing on a keyboard which is kind of terrifying if you think about it