The missionary is building the product and building the service because they love the customer, because they love the product, because they love the service. The mercenary is building the product or service so that they can flip the company and make money. Position yourself with something that captures your curiosity, something that you're missionary about.

We are a mission-driven company. In order to do this, we have to build a great team. And in order to do that, you need people to know they can make a bunch of money. So we need a business model to make a lot of money.

For the first time we're allowing developers who don't work at Facebook to develop applications just as if they were. That's a big deal because it means that all developers have a new way of doing business if they choose to take advantage of it. There are whole companies that are forming whose only product is a Facebook Platform application.

We help Chinese companies grow their customers abroad. They use Facebook ads to find more customers. For example, Lenovo used Facebook ads to sell its new phone. In China, I also see economic growth. We admire it.

More than four million businesses have Pages on Facebook that they use to have a dialogue with their customers.

At Facebook, we are squarely in the camp of the companies that work hard to charge you less ... I think it's important that we don't all get Stockholm syndrome and let the companies that work hard to charge you more convince you that they actually care more about you.