Kutcher, Oseary, and Burkle were the first major investors to back Genius — formerly known as Rap Genius — an app that allows users to look up song lyrics by drawing from its vast collection of music.
The company founders expanded the software to become a full annotation program that allows users to roll over text on a screen to get additional information and background. To get the word out about Genius, Kutcher turned to his enormous Twitter fan base, using the power of social media for free advertising and promotion.
Their next few startups are now some of the most widely used services, and you probably use them…
