WTF Fun Fact – Free Wrigley’s Gum

William Wrigley, founder of Wrigley’s Gum, invented direct mail marketing. In 1915, he mailed a pack of gum to every person in the phone directory in the United States (~1.5 million homes). – WTF Fun Facts

Source: “The Wrigley’s Story — Innovation Lessons From a Chewing Gum” — Medium

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