Basically trust and brand, as they said in the article. They had to come up with both supply and demand at the same time. You wouldn't use a service with limite

Basically trust and brand, as they said in the article. They had to come up with both supply and demand at the same time. You wouldn't use a service with limited supply, and as a renter, you wouldn't list your property on a service without any people willing to rent your spare room/apartment.