List of sources
http://www.huffingtonpost.com/2012/02/27/the-fancy-social-media-website_n_1305006.html
http://fortune.com/2016/10/13/pinterest-monthly-active-users/
http://www.businessinsider.com/wanelo-pinterest-2013-1
http://expandedramblings.com/index.php/pinterest-stats/
https://www.etsy.com/teams/7718/questions/discuss/12522320/
https://www.bigcommerce.com/blog/wanelo-4x-increased-traffic-conversions/
http://www.gartner.com/technology/research/methodologies/hype-cycle.jsp