Google doesn't serve advertisements against image searches, as it does with normal search results. This costs the company as much as $200 million in annual revenue, Google VP Marissa Mayer told KQED's Michael Krasny in this clip. So why does Google hold back? Mayer says the search engine is looking out for the user: "Our metrics show us that people would actually start using image search less. Not a lot less, but about 1 percent less. We actually value the user so much that we said no." Cute. But what about the shareholders? The plummeting dollar won't save Google every quarter.