Which retail innovation did the World Wildlife Fund (WWF) pioneer in 2018 that created a revolutionary subscription model for wildlife conservation?

The retail landscape for wildlife conservation products has evolved dramatically in recent years. Organizations are finding innovative ways to fund conservation efforts through consumer products, creating unique retail experiences that educate while generating revenue. This poll tests your knowledge of cutting-edge retail innovations in the wildlife conservation space.

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WWF's 'Wildlife Guardian' program, where subscribers receive monthly updates about a specific endangered animal they're helping protect
WWF's 'Habitat Heroes' augmented reality app that transforms retail spaces into virtual wildlife preserves
WWF's 'Conservation Marketplace' blockchain platform that allows consumers to directly fund specific conservation projects
WWF's 'Earth Exchange' retail stores where all products are made from reclaimed ocean plastic