Why Snapchat’s lackluster ads threaten its $16 billion valuation

(By Heather Somerville, Reuters) – Snapchat, maker of a free mobile app that lets users send videos and messages that disappear in seconds, is struggling to gain traction with advertisers, fueling investor concern that its $16 billion valuation isn’t justified by a business that hasn’t yet shown it has a steady source of income. Even […]...