Pinterest beats revenue, user add estimates; shares rise

(Reuters) - Pinterest Inc beat analysts' estimates for fourth-quarter revenue on Thursday, as it added more monthly active users and earned higher revenue per user, sending its share up 9% in extended trading.The company has added augmented reality features to enhance visual search in its platform and entered markets such as Denmark, Norway and Switzerland in its attempt to drive user growth.Pinterest posted on average revenue of $1.22 per user globally in the fourth quarter, beating analysts'..