Jack Dorsey cofounded Twitter in 2006 and the company has made him a billionaire. He is famous for his unusual life of luxury, including a daily fasting routine, regular ice baths, and a penchant for dating models. Dorsey has also been caught up in the techlash, which engulfed companies like Twitter and Facebook last year. Visit BusinessInsider.com for more stories. From fighting armies of bots to quashing rumours about posting his beard hair to rapper Azealia Banks, Twitter CEO Jack Dorsey leads an unusual life of luxury. Dorsey has had a turbulent career in Silicon Valley.