For example, WhatsApp restricted the number of times a user could forward something, and developed automated systems that detect and flag objectionable content. Founder Pavel Durov says tech is meant to set you free Stocks closed in the red Friday as investors weighed upbeat remarks from Russian President Vladimir Putin about diplomatic discussions with Ukraine against a weaker-than-expected print on U.S. consumer sentiment. Again, in contrast to Facebook, Google and Twitter, Telegram's founder Pavel Durov runs his company in relative secrecy from Dubai. Anastasia Vlasova/Getty Images
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