Which innovative retail/product strategy did NASA implement to extend the Hubble Space Telescope's useful life and customer experience, setting it apart from previous space observatories?

The Hubble Space Telescope revolutionized astronomy and our understanding of the universe. But behind this groundbreaking scientific instrument was also an innovative product strategy and customer experience approach. This poll tests your knowledge about how NASA and its contractors approached the development, 'marketing,' and ongoing 'customer service' of this remarkable astronomical product that has captured both scientific data and public imagination for decades.

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Modular design with serviceable components, allowing astronauts to perform 'in-store repairs' and upgrades during space shuttle missions
Subscription-based access model where research institutions could purchase premium observation time packages at tiered price points
Augmented reality companion app that allowed consumers to preview what Hubble would see before scheduling an observation
Customer loyalty program offering research institutions priority access based on publication impact factors from previous Hubble data usage