Which innovative advertising strategy did the World Wildlife Fund (WWF) pioneer in 2020 that led to a 340% increase in donation conversions?

Conservation organizations face unique challenges in marketing their causes and raising awareness about endangered species. In 2020, one wildlife conservation brand revolutionized their approach through an innovative digital marketing strategy that dramatically increased both awareness and donations. This campaign became a case study in effective cause marketing within the Animals & Wildlife sector. Do you know which breakthrough technique they pioneered?

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AR-powered endangered species 'appearances' that used smartphone cameras to place virtual endangered animals in users' real environments
Wildlife NFTs that gave owners exclusive access to live camera feeds from remote conservation areas
The 'Species Spotify' campaign that matched users with endangered animals based on their music preferences
The 'Extinct Email' tool that temporarily deleted user emails to demonstrate the permanence of extinction