Which subscription model innovation has most dramatically increased global access to scientific journal articles in the past decade?

The landscape of scientific research and education has been transformed by digital subscription models. Once dominated by expensive journal subscriptions at academic institutions, today's science information ecosystem offers various models for researchers, educators, and science enthusiasts. Test your knowledge about how subscription models have revolutionized access to scientific knowledge and resources!

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Open Access publishing with Article Processing Charges (APCs)
Tiered institutional subscriptions based on university size
Individual researcher subscription bundles
Pay-per-citation model for research papers