Which retail pricing strategy was pioneered by Celestron in the early 2000s that revolutionized how premium telescopes are sold to amateur astronomers?

The astronomy retail sector has undergone significant transformation in recent decades. From specialized telescope shops to large science centers with astronomy departments, the way people purchase stargazing equipment and educational materials has evolved dramatically. This poll tests your knowledge about the current retail landscape for astronomy products and how companies market to both amateur and professional astronomers.

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The 'First Light Guarantee' program allowing full refunds if customers weren't satisfied with their first viewing experience
The 'Planetary Payment Plan' dividing telescope costs into monthly installments timed with moon phases
The 'Observatory Subscription' model where customers paid annual fees for telescope upgrades
The 'Stellar Exchange' program allowing customers to trade in older models for credit toward advanced equipment