Latest News - pinterest valuation

This week there was some shocking news from digital scrapbook site Pinterest- a 2.5 billion valuation and a 200 million funding round. Are these just crazy numbers for a site that has no ads, no dues, and no announced projected revenue source? Clipped from: www.bloomberg.com (share this clip)   Pinterest is now worth more than publicly traded Internet companies Zynga Inc. (ZNGA), Yelp Inc...