Given the question: What type of details about justin waldron can be gathered from the following bio? Bio: justin waldron -lrb- june 18 , 1988 -rrb- is an american internet entrepreneur best known as the co-founder of zynga , which makes online social and mobile games . zynga is considered to be the pioneer of the social gaming industry , which is expected to reach $ 5.5 billion by 2015 . within four years of its founding , zynga had grown to a $ 1 billion company and in 2011 held the largest ipo since google . waldron left zynga in october 2013 and is currently an active angel investor and advisor in various other technology companies . zynga 's top games include : cityville , farmville , the pioneer trail , zynga poker , mafia wars , empires & allies , and adventure world .
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