this applies to many of the "sharing economy" businesses.<p>airbnb seems to have a monopoly at present but as their listings become shown on competitor booking sites with lower fees customers will soon follow and the whole thing becomes commodified, and eventually peer2peer or non-profit/non-fee networks will win out.<p>the supreme type of monopolies enjoyed by facebook/ebay/amazon will not occur in these style businesses unless they can enforce exclusivity, and most (non-US) states won't allow this.