Back around 2009 or 2010, my roommates and I put a spare room in our Berkeley place on Airbnb. One night the Airbnb CEO booked the room and came over for the night. Sounds like the company had grown large enough that the co-founders had to move out of their apartment-turned-office. The CEO had not yet gotten his own apartment. He instead would stay each night in a different Airbnb rental and go back to SF in the morning for work.