Although some channels have been removed, the curation process is considered opaque and insufficient by analysts. Messages are not fully encrypted by default. That means the company could, in theory, access the content of the messages, or be forced to hand over the data at the request of a government. Perpetrators of such fraud use various marketing techniques to attract subscribers on their social media channels. 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. Anastasia Vlasova/Getty Images
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