Moral of story: don't use a service the business model of which you don't fully understand. It doesn't matter if other people have used it, if you don't understand how it works, use it at your peril.

If I were a major hotel chain I wouldn't touch these Roomer folks with a barge pole. A great opportunity for my staff resources to be squandered as my staff tries to iron out the headaches caused by a transaction in which they played no part whatsoever.