Which wildlife conservation subscription model pioneered the 'adopt an animal' concept and has generated over $300 million for conservation efforts since its launch in 1973?

Conservation organizations have revolutionized funding through innovative subscription models that allow everyday people to contribute to wildlife protection. These recurring revenue programs have transformed how endangered species are saved and habitats preserved. Test your knowledge about one particularly successful subscription model that changed the game for wildlife conservation and created a blueprint others have followed.

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World Wildlife Fund's Species Adoption Program
National Geographic's Wildlife Watch Membership
Conservation International's Guardian Program
The Nature Conservancy's Species Stewardship Initiative