Which psychological pricing strategy revolutionized the music streaming industry when Spotify introduced their Premium Family Plan in 2014?

In the digital age, music streaming has transformed how we consume music, but the pricing strategies behind these services are fascinating business case studies. Subscription tiers, freemium models, family plans, and student discounts all play strategic roles. This trivia question explores a key psychological pricing tactic that revolutionized the music streaming industry and helped one platform gain significant market advantage over competitors.

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Price anchoring - setting the family plan price against individual subscriptions to make it appear as exceptional value
Decoy pricing - introducing an intentionally overpriced tier to make the family plan seem more reasonable by comparison
Charm pricing - setting prices just below round numbers (like $14.99 instead of $15) to create the perception of significantly lower cost
Loss leader strategy - offering the family plan at a loss to acquire customers who would purchase additional content