I can't fault Airbnb hosts if they use this -- if I was a host, I probably would. Nevertheless, it takes some of the charm and advantage out of it for us hostees. Airbnb seemed like a marketplace where sellers for the most part aren't trying to optimize their profits to squeeze out every last buck.<p>Edit: Actually, to be more accurate, it didn't feel like much of a "marketplace" at all, and that's where the charm was. You weren't terribly aware of supply and demand and the rest of econ 101 when using it.