The problem lies in their profit model. They offer great free services. Their profits come from advertising, often subliminal advertising. This means flashing messages for very brief periods below the normal human perception level, reaching the subconscious. Subliminal advertising has long been used by conventional advertisers too, highlighted in books like Vance Packard’s ‘The Hidden Persuaders’.from Tech-Economic Times https://ift.tt/32NrPmR
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