AddThis tallies a year of sharing to determine 2012 winners and losers [infographic]

'Tis the season for reflection -- through data crunching, of course! The folks at AddThis have tallied a year's worth of social shares to uncover 2012's biggest takeaways.

AddThis creator closes $20M in series D

Clearspring Technologies, the creator of the AddThis social content sharing platform, can now add this to its list of accomplishments: $20 million in series D funding in a round led by Institutional Venture Partners (IVP).Clearspring’s existing investors also participated in …