Which subscription-based astronomy service pioneered the 'pay-per-minute' model for remote telescope access that revolutionized amateur astronomy in 2015?

The astronomy industry has undergone significant digital transformation with subscription-based access to telescopes, observatories, and astronomical data becoming increasingly popular. These subscription models have changed how amateur astronomers, researchers, and educational institutions access the cosmos. This poll tests your knowledge about the evolving business models in modern astronomy services and how they're reshaping access to the universe.

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Slooh Space Camera
iTelescope Network
Celestron Skyportal
NASA WorldWide Telescope