Which revolutionary marketing strategy did the World Wildlife Fund (WWF) pioneer in 2018 that allowed supporters to digitally 'adopt' endangered species through blockchain technology?

In today's competitive landscape, wildlife conservation organizations employ various marketing strategies to raise awareness and funding. Effective marketing can make a crucial difference in protecting endangered species and their habitats. This trivia question explores an innovative marketing strategy that revolutionized how conservation organizations engage potential donors and raise awareness about threatened animal species.

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NFT Conservation Tokens - unique digital collectibles representing specific endangered animals with proceeds funding their protection
Virtual Reality Safari Tours - immersive experiences where users could visit digital representations of endangered habitats
Animal Influencer Accounts - social media profiles managed by WWF pretending to be endangered animals
Conservation Credit Cards - banking partnerships that donated a percentage of every purchase to specific animal protection programs