> There are simply no offline business models of user generated content Many newspapers still run classified ads (https://en.wikipedia.org/wiki/Classified_adve

> There are simply no offline business models of user generated content Many newspapers still run classified ads (https://en.wikipedia.org/wiki/Classified_advertising https://en.wikipedia.org/wiki/Classified_advertising). Many supermarkets still have boards where people can announce that they have something to sell, are looking for a house cleaner, etc.