Koum admitted that the company does have a strategy to earn more revenue, but he insisted it bypasses the advertising market. As the number of people with access to an Internet-connected phone increases, it will become "extremely easy to monetize the application," he said.
Read more: http://www.portada-online.com/2013/04/19/whatsapp-has-no-plans-to-market-its-platform-through-advertising/#ixzz2cOACuZua