Which innovative loyalty program feature did Tyndale House Publishers introduce that dramatically increased retention rates for their Bible subscription service?

In recent years, religious organizations have been adopting modern retail strategies to engage their communities. Subscription and loyalty programs for religious texts and materials have become increasingly popular as ways to build sustained engagement and support. This trivia question explores an innovative approach one major religious publisher took to increase customer loyalty and retention through a unique program design.

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Personalized verse highlighting based on AI analysis of a subscriber's reading patterns
The 'Scripture Companion' program that paired subscribers with accountability partners
Tiered membership levels that unlocked access to exclusive theological commentaries
Seasonal reward points that could be donated to mission organizations