Which pricing strategy did Khan Academy employ when introducing their Premium subscription service that exemplifies the 'price anchoring' concept?

Pricing mathematical education products effectively requires understanding both market dynamics and educational value. This poll explores how leading math education companies apply the 'price anchoring' strategy to maximize perceived value while optimizing sales. Price anchoring is particularly important in educational products where demonstrating value proposition can be challenging. Test your knowledge of this sophisticated pricing approach in the mathematics education industry!

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They maintained their core content as free while pricing Premium at $96/year, creating a psychological anchor against competitor prices of $300-500/year
They initially launched Premium at $300/year, then quickly dropped to $96/year to create the perception of a significant discount
They used a 'freemium with time limit' model, allowing 30 days free access to Premium features before requiring payment
They implemented tiered pricing with three subscription levels ($49, $96, and $196) to make the middle option appear most reasonable