Interesting overview but:

Less Noise

“Social media still suffers from a noise issue. It???s like a constant fog horn blaring out and the big problem is that you miss most of the good stuff. There have been some improvements in relevancy filters but to a large extent your networks are all set up manually and unless you take the time to personally curate”

The essence of social media IS the fact that inidivduals do curate their interests.  Any outsourcing will always be noise.