Which innovative pricing strategy did Rosetta Stone pioneer that transformed the language learning software market?

In the world of linguistics and language products, marketing strategies often leverage fascinating psychological principles to appeal to language learners and enthusiasts. This poll tests your knowledge about a notable pricing strategy that revolutionized how language learning products are sold. The approach fundamentally changed consumer perception of value in educational linguistics products and has been widely adopted across the industry.

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Tiered subscription model with escalating fluency levels
Pay-per-word mastered pricing system
Fluency guarantee with money-back promise
Dynamic pricing based on language difficulty rating