For all of you who haven't snapped yet, this is free social signals. Every tweet, every share adds to your reputation and they are not all coming from the same source. Social signals is big in SEO right now, and the visits last 10 seconds which avoids it being a bounce.
Even if every one is using a facebook and twitter account that they just use for SEO and it is a throwaway, They are still mentions of your site on twitter and shares on facebook, and real people putting eyes on your site, and you can control what the content of the subject matter is. Its like having hundreds of people that you can have re-tweet your stuff and you can put in three different descriptions.
How much do you usually pay for that?
I wouldn't run views at an adsense site, but that is all I would worry about.
