For example, WhatsApp restricted the number of times a user could forward something, and developed automated systems that detect and flag objectionable content. I want a secure messaging app, should I use Telegram? READ MORE Friday’s performance was part of a larger shift. For the week, the Dow, S&P 500 and Nasdaq fell 2%, 2.9%, and 3.5%, respectively. "And that set off kind of a battle royale for control of the platform that Durov eventually lost," said Nathalie Maréchal of the Washington advocacy group Ranking Digital Rights.
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