Lots of these marketplaces face the same major challenge of offline commerce once first contact is made. Basically, there's little to nothing to stop the seller from taking the relationship offline and make 2x the money as the relationship continues. Services try to mitigate this with value adds like scheduling services and providing more leads, but it's so difficult to police that most just try to continue to fill the funnel.
Airbnb is different because the relationship is long distance and trust, payments, insurance, etc are a much larger issue. It's also typically a one-time transaction and there's little need to take the deal offline. I'm sure they deal with this with people wanting to stay beyond their trip date or trying to book directly, but Airbnb can easily track this stuff with the scheduling feature and seeing discrepancies when users try to go offline.
Airbnb is different because the relationship is long distance and trust, payments, insurance, etc are a much larger issue. It's also typically a one-time transaction and there's little need to take the deal offline. I'm sure they deal with this with people wanting to stay beyond their trip date or trying to book directly, but Airbnb can easily track this stuff with the scheduling feature and seeing discrepancies when users try to go offline.