After college, Christos started, and later sold, a small Greek airline, then helped governments and entrepreneurs in Africa to start airlines of their own. He also received an MBA from Stanford and wrote for The Economist. Today, Christos is co-founder of Campfire, a revolutionary audio platform that pays users to ask and answer great questions. Besides sparking intimate conversations with their favourite experts, celebrities and podcasters, users can donate their earnings to their favourite charities.