Entrepreneurs Being Entrepreneurs. on Instagram: "When Mark Zuckerberg was 22, Yahoo offered $1 billion to buy Facebook in 2006. At the time, the platform had about 10 million users, mostly college students, and was still privately owned. Many investors and board members favored accepting the deal, which would have given Zuckerberg nearly $200 million. But he declined, believing Facebook had much greater potential. He later explained that he didn’t know what he would do with that money and wante