We interviewed Tumblr founder David Karp all the way back in November 2010, and asked him for any words of wisdom he would give to startup founders. Since he just sold his company for $1.1 billion to Yahoo, we thought we should revisit what he had to say. :    <div>Please enable Javascript to watch this video</div> Produced by Business Insider VideoSEE ALSO: What's Tough And Awesome About Being A Well-Known Couple In Silicon Valley Please follow SAI on Twitter and Facebook.Join the conversation about this story »     Read similar