Which innovative customer loyalty program did Celestron implement in 2018 that dramatically increased their amateur astronomer customer retention rate by over 35%?

The astronomy retail market has seen dramatic shifts over the past decades as technology advances and amateur astronomy becomes more accessible. Major telescope manufacturers and retailers have employed various strategies to maintain customer loyalty in this specialized market. Test your knowledge about one of the most significant product launches and retention strategies in astronomy retail history!

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The 'Celestial Rewards' program offering points for astrophotography submissions that could be exchanged for equipment upgrades
The 'Star Gazer Elite' subscription service offering priority access to limited-edition telescope models and accessories
The 'Dark Sky Partnership' providing members with exclusive access to private observing locations and guided astronomy events
The 'Telescope Trade-Up' guarantee allowing customers to receive 80% credit when upgrading to higher-end models within 3 years of purchase