Which scientific publishing innovation was first launched by PLOS (Public Library of Science) in 2006, creating a new subscription model where authors pay for publication while readers access content for free?

The scientific publishing landscape has undergone dramatic changes in recent years. Traditional subscription models are being challenged by new approaches to research dissemination. The open access movement has gained significant momentum, with various models emerging to sustain scientific publishing while improving accessibility. This trivia question explores a pivotal moment in scientific publishing history that changed how researchers access vital information.

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PLOS ONE - the first megajournal with article processing charges (APCs)
PLOS Premium - a tiered subscription model with institutional discounts
PLOS Select - a hybrid journal allowing both traditional and open access publishing
PLOS Direct - a peer-to-peer subscription exchange platform