Pinterest 3rd most popular social site

According to a report done by digital marketer report, concluded that the photo sharing web site Pinterest has climed to be the third most popular social media network.  Pinterest is a virtual photo sharing website that users share pictures and become pinned in pictures.  This is something that marketers are starting to watch closely. With Pinterest expanding so rapidly people are starting to see the potential use of this website as a way to reach consumers. Pinterest was started in 2010 and it was not until recently that it started to become as popular until recently.  Since January 2012 Pinterest has grown 50% which is an astronomical amount, although some experts think that this may just be a fad and that it may be over soon. While other experts and even some corporations are starting to use Pinterest as a marketing tool.  I think that this is some thing that could potentially be very useful in terms of marketing.  If the company continues to steadily grow at a rapid rate then I think that there is a good chance that it would be helpful to marketers, although if it is really a "fad" then it will  turn out to be not as helpful to marketers than it seems to be.  After reading this article I feel as though this does yield a great deal of potential to marketers , what if Pinterest ended up becoming most popular social media site, would it be more useful to marketers than Facebook or Twitter?