Love this post about the LinkedIn research that highlighted employee shares receive on average 2x higher click-through rates than company channels.  

It's true, if executed well, employee advocacy will pay dividends but it takes more than just signing up for a content sharing tool and letting your employees amplify content to the social world.

As @timothy_hughes points out, it takes time to become an influencer.  Automated tools are never going to achieve this.  It takes a range of content, training and insight.  You need to have an opinion to stand out from the crowd.