Social Pro Daily Why Facebook hashtags were doomed to #fail By David Carrillo October 3, 2013 David Carrillo Recommended articles {"title":"Recommended","post_types":["post","page"],"channel":"parsely","lineup_id":"54851","since_qty":226,"since_time":"d","until_qty":1,"until_time":"m","q":"","num_posts":0,"vertical":"performance-marketing"}