If you’re like me, you remember when Facebook went from something dismissible to something enormous, especially regarding its value. I remember initially wondering: ‘how are they worth SO much?’ After all, using Facebook has always been free, so it doesn’t matter how many billions of people have accounts and use the site: free multiplied by any number is still no profit. What’s the secret? As we now know, it’s ads, of course. Despite its current market turbulence, the company has a market cap greater than $300 billion. Its business model is certainly effective.