Which retail strategy revolutionized religious text distribution in the 2010s, resulting in a 300% increase in digital Bible engagement?

Religious texts and philosophical works represent some of the oldest and most influential 'products' in human history. In recent years, publishers of these materials have embraced modern retail and marketing strategies to reach new audiences while respecting traditions. This trivia question explores an innovative retail approach that dramatically increased accessibility to religious and philosophical texts in the digital age.

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The YouVersion 'free app' model, which eliminated price barriers while monetizing through partnerships and donations
Amazon's 'Sacred Text Subscription Service' with monthly access to annotated religious texts
The 'Pay What You Believe' sliding scale pricing model pioneered by Zondervan Publishers
HarperCollins' 'Religious Text Exchange Program' allowing users to trade physical books for digital versions