but google, facebook, apple...etc. already huge in US with vast amount of resources before they enter foreign market. a start up in US/China have one big market for them to grow domestically and gain enough resources before entering foreign market.
lets say you are a small German start up. is German big enough to grow and gain enough resources before you enter say Estonia?
edit: isn't Rocket Internet business model is copying successful US company for Europe before the US company have enough resources to enter?