Yahoo to Pay Tumblr’s David Karp $81 Million to Stay for 4 Years

David Karp, 27-year old founder of Tumblr, is set to earn a bonus of $81 million in addition to his salary if he stays at Yahoo! for the next four years. Tumblr was launched in Feb. 2007 by Karp, a New York City high school drop out and acquired by YAHOO for $1.1 billion in May 2013.