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1. Item Rarity vs Item Value (Virtual Economy Gamification Tips)
2. Scarcity vs Abundance (Virtual Economy Gamification Tips)
3. Game Economy vs Virtual Economy (Virtual Economy Gamification Tips)
4. Consumer Behavior vs Player Behavior (Virtual Economy Gamification Tips)
5. Economic Incentives vs Game Incentives (Virtual Economy Gamification Tips)
6. In-Game Purchases vs Microtransactions (Player-Centric Gamification Tips)
7. Pay-to-Win vs Free-to-Play (Virtual Economy Gamification Tips)
8. Subscription Model vs Freemium Model (Player-Centric Gamification Tips)