Which pricing strategy was first successfully implemented by Tencent's Honor of Kings (Arena of Valor) that revolutionized mobile gaming monetization?

In the world of gaming and virtual worlds, pricing strategies have evolved dramatically as digital economies have matured. From subscription models to free-to-play with microtransactions, developers have experimented with numerous approaches to monetize their virtual worlds while balancing player satisfaction. This trivia question explores a significant pricing innovation that revolutionized revenue models in the gaming industry.

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Battle Pass subscription model with tiered rewards
Gacha system with variable reward ratios
Dynamic pricing based on player skill level
Seasonal cosmetic collections with limited availability windows