Which innovative marketing strategy did Wolfram Alpha use when first launching their computational knowledge engine to the mathematics education market?

In the world of mathematics education and products, marketing strategies have evolved significantly. Publishers and educational technology companies use various approaches to reach mathematics educators, students, and institutions. This poll tests your knowledge about a unique marketing strategy that revolutionized how mathematical software tools were introduced to the market. Think about how mathematical product companies have leveraged data and analytics in their marketing approaches.

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The 'Challenge a Mathematician' campaign where users could submit problems they believed the software couldn't solve
The 'Mathematical Influencer' program that sent free software to popular YouTube mathematics content creators
A 'Mathematics Through History' interactive timeline showing how the software could have solved famous historical problems
The 'Mathematical Revolution Guarantee' offering full refunds if the software couldn't solve any standard calculus problem