There is an old Chinese saying "Things of a kind come together. People of a mind fall into the same group.". In the wave of Web 2.0, there are many emerging IT giants coming out the world. And many of them are founded by a group of people who previously worked together at the same company such as PayPal and Facebook. This is called giant mafia. Let's see what people from the big IT giant have done after leaving the original company.The PayPal mafiaPeter Thiel, co-founder and CEO of PayPal before sold to eBay. He is the founder of Founders Fund, a venture capital; and he also co-founded Pa...