Which literary subscription service was the first to reach over 1 million subscribers and pioneered the 'unlimited reading' model for a fixed monthly fee?

The book publishing industry has evolved dramatically in the digital age, with subscription services becoming a major revenue stream for publishers and authors alike. Different subscription models have achieved varying levels of success, with some becoming industry game-changers. Test your knowledge about the most successful literary subscription services and their innovative business models that have revolutionized how readers consume literature.

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

Kindle Unlimited (Amazon)
Scribd
Audible (before switching to credit model)
Barnes & Noble Readouts