It's very easy to get around those questions. Facebook is great at it. There is usually a customer-friendly reason, which is the one they answer with publicly. For example, "we collect your information to serve you content that you like". But the real reason is, "We collect your information, because your information can be sold in many ways, indirectly and directly, to make us money".
Both are arguably true. But for a publicly traded company, the "Why" must always come back to the bottom line. The ultimate goal is to build value for shareholders. Any answer that doesn't include some reference to the bottom line is utter BS.
