What innovative retail strategy did SpaceX use in 2018 that broke e-commerce sales records for science-related merchandise?

SpaceX has transformed not just space travel but also retail merchandising in the science industry. Their approach to product development and marketing has created a unique retail model that blends cutting-edge science with consumer products. This poll tests your knowledge of how SpaceX has leveraged retail strategies to build brand loyalty and generate additional revenue streams while promoting space science to the general public.

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They sold actual pieces of returned rockets as limited-edition collectibles with blockchain verification
They launched the 'Not-A-Flamethrower' product that generated $10 million in revenue within days
They created the first-ever orbital billboard visible from Earth that advertised their merchandise store
They implemented the first AI-powered product recommendation system based on personal astrophysical interests