If you look at the listing, you'll see "Room type: Entire home/apt". So Derek's got the whole apartment to himself, not just a room in someone's apartment. I w

If you look at the listing, you'll see "Room type: Entire home/apt". So Derek's got the whole apartment to himself, not just a room in someone's apartment. I would guess that people who stay for long stretches like that tend to look for full apartment listing, since the host might also be obnoxious, and it might get old to stay with someone for a month even if they're just neutral.