Which innovative loyalty program approach has most significantly boosted customer retention rates among major telescope and astronomy equipment retailers?

The astronomy retail sector has seen significant changes in how observatories, planetariums, and telescope retailers engage with customers. As interest in stargazing has grown, especially during the pandemic when people sought socially-distant outdoor activities, astronomy retailers have adapted their loyalty programs to meet unique customer needs. How well do you understand the innovations in this specialized retail sector?

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Virtual star-hunting expeditions where customers earn points by photographing and identifying celestial objects with purchased equipment
Traditional point-based systems where customers earn 1 point per dollar spent, redeemable for store merchandise
Social media hashtag campaigns where customers share astronomy photos for small discounts on accessories
Seasonal equipment rental subscriptions with priority access to limited-edition telescopes