If Greta Garbo — the iconic movie star who famously wanted to be left alone — were around today, she might be a prime customer of the online privacy industry. Fox Photos/Getty Images hide caption

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Actress Reese Witherspoon is among a number of celebrities who yearn for privacy. Peter Kramer/AP hide caption

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Gary Vaynerchuk reviews wines, including the official champagne of Prince William and Kate Middleton's wedding, for the Daily Grape. Vaynerchuk began video blogging wine reviews in 2006. via Daily Grape hide caption

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