Which music streaming service had the most unusual product launch strategy, initially releasing as an invitation-only platform where each user could invite 5 friends, creating a 'digital scarcity' effect?

The music industry has seen some revolutionary product launches that changed how we consume and experience music. From innovative streaming platforms to groundbreaking audio devices, these launches have shaped the industry's evolution. This trivia question explores one of the most significant music product launches of recent decades and the strategic approach behind it. Test your knowledge of music industry product strategy!

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Spotify, requiring users to have invitation codes for its first six months in 2008, which created a sense of exclusivity and drove organic growth
Apple Music, launching exclusively on Beats headphones for three months before wider release to create buzz among audiophiles
Tidal, initially available only to artists who owned equity in the platform, requiring fans to follow these artists to gain access
Pandora, launching first as a limited beta only available to music industry professionals for feedback before public release