When Penguin Books launched their Penguin Classics line in 1946, what groundbreaking pricing strategy did they use that revolutionized access to literature?

In the world of publishing, marketing strategies have shaped how we discover and connect with literature. Among the most influential campaigns in literary history was Allen Lane's revolutionary approach to making classic literature accessible to the masses. This trivia question explores how a bold pricing and distribution strategy transformed the publishing industry and democratized access to great works of literature in the 20th century.

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Selling paperbacks at the same price as a pack of cigarettes, making classics affordable to average readers
Implementing a subscription model where readers received one classic novel per month for a flat annual fee
Using a 'buy one, get one free' promotion that doubled sales but maintained premium pricing
Offering different price tiers based on reader income, with an honor system for payment