Marc Jacobs made a great move casting his new Marc by Marc Jacobs campaign on Instagram and Twitter. Everyone could post a photo with a hashtag #CastMeMarc to become part of a new Fall/Winter 2014 campaign. Thousands of people from all over the world took part. So what do we get: fresh faces, interesting concept and more than 70000 photos on Instagram. Thumbs up! Social platforms truly is a new power!!!