Saw this sign while showing a house to some clients. Google fiber or GTFO

He was behind the couch the whole time.

They don't go door to door in my area, they just setup and wait right next to the entrance/exit of all the major stores.

they probably do both, you just dont happen to live someplace that gets a lot of traffic for them to bother with. the booth sales are afterwards, when you receive and deliver all the orders you received going door to door and from your parents workplaces.