As social networks mature, revenue—how they make it and how much they make—becomes an increasingly important part of the conversation. During the early lifecycle of services like Snapchat and Pinterest, there is a great deal of hype related to these new methods of interaction. In the meantime, it falls to the networks to monetize effectively in order to maintain their presences. And it seems that Pinterest is successfully doing so.
Pinterest has always been a home for visual content, so it was naturally able to act as an advertising platform for brands, particularly apparel brands.