This story was originally published on Social Media Today. To receive daily news and insights, subscribe to our free daily Social Media Today newsletter. Pinterest has reached a new milestone of 600 million monthly active users, while it also posted a 17% year-over-year increase in revenue in Q3, continuing its steady growth as a key discovery platform. First off, on users. As noted, Pinterest is now up to 600 million monthly actives, adding 22 million over the last reporting period. As you can see in th ...