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WhatsApp has not spent a penny on marketing. The company spends nothing on user acquisition and doesn’t even employ a marketer or a PR person. The phenomenon is completely viral. Whatsapp garnered the numbers through word of mouth. Jan hates advertising and keeps a note on his desk from co-founder Brian Acton that simply reads, “No Ads! No Games! No Gimmicks!†It serves as a daily reminder to focus on their one goal of providing a pure messaging experience to WhatsApp users.