What innovative pricing strategy did CERN implement in 1993 that revolutionized global access to scientific information?

The world of scientific research involves not just brilliant minds and groundbreaking experiments, but also complex funding and pricing models. This trivia question explores how one of the world's most prestigious scientific organizations approached a particular pricing challenge that had significant implications for scientific advancement worldwide.

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They made World Wide Web technology available for free, foregoing potential licensing revenue in favor of universal access
They created a tiered subscription model for academic journals based on a country's GDP
They implemented a patent-sharing consortium where member states paid proportional to their scientific output
They established a 'pay what you can' model for accessing the Large Hadron Collider's experimental data