Guest post by Ekaterina Walter (@ekaterina), a social innovator at Intel and the author of “Think Like Zuck: The Five Business Secrets of Facebook’s Improbably Brilliant CEO Mark Zuckerberg” This question has been of great interest to investors since the 2012 IPO that saw the company valued at $100 billion. Facebook already has 1 billion users worldwide and 44% of all internet users have a profile. Facebook pages make up one in five page views on the internet. So is…