ECONOMICS -Noah Kagan built two multi-million dollar online businesses before turning 28

'He was employee #30 at Facebook, #4 at Mint, had previously worked for Intel (where he frequently took naps under his desk), and had turned down a six-figure offer from Yahoo. Noah’s helped create Gambit, an online gaming payment platform and a multi-million dollar business; and AppSumo, loved by entrepreneurs and moms everywhere. He also helped pour fire on both the 4-Hour Workweek and 4Hour Body launches.'
http://www.fourhourworkweek.com/blog/2011/09/24/how-to-create-a-million-dollar-business-this-weekend-examples-appsumo-mint-chihuahuas/