Which innovative marketing strategy did Radiohead pioneer in 2007 with their album 'In Rainbows' that disrupted traditional music distribution?

The music industry has seen numerous innovative marketing campaigns that changed how artists connect with fans. From surprise album drops to immersive experiences, marketing strategies have evolved dramatically in the digital age. This poll tests your knowledge of a groundbreaking marketing approach that transformed how music is promoted and consumed.

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The 'pay-what-you-want' digital release model, allowing fans to name their own price (including $0) for the album download
The first album released exclusively as a smartphone app with interactive visuals for each song
A social media scavenger hunt where fans unlocked songs by solving puzzles across different platforms
Individual song releases over 10 consecutive weeks, with fan voting determining the final album tracklist