Which analytics-driven feature did Fortnite implement in 2018 that increased player retention by 35% according to Epic Games' case study?

The gaming industry has transformed how companies use player analytics to drive engagement and revenue. This poll explores how one major battle royale game leveraged sophisticated customer analytics to make a critical product decision that significantly impacted their business. Test your knowledge of how data-driven decision making shapes the virtual worlds we play in!

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Cross-platform progression system that synchronized player inventories and achievements across all devices
Dynamic difficulty adjustment based on individual player skill metrics and session length
Personalized in-game item shop recommendations using collaborative filtering algorithms
Geolocation-based matchmaking to reduce latency and improve player experience