AddThis makes money by selling 3rd party audience segments to advertisers like me. I assume they get this data by tracking what users view what pages through th

AddThis makes money by selling 3rd party audience segments to advertisers like me. I assume they get this data by tracking what users view what pages through their sharing buttons. Example segments I can buy to advertise too: http://i.imgur.com/JF6ZZPC.jpg http://i.imgur.com/JF6ZZPC.jpg The author doesn't even mention the big players: every FB share or like button, on all that nasty porn you watch (even in incognito mode), straight to FB. They recently changed their policies and signaled that they are going to start using this data for ad targeting, probably in a push to expand FAN and be more competitive with Google. Something as simple as a share button that some blogger copy and pasted into their blog turned into an ad tech/data company! I personally love that story and think that's cool and innovative thinking from AddThis. But I also think more data = better ads, at the expense of privacy (probably not a popular opinion around here).