Ad-supported model

1. Game Revenue vs Virtual Revenue (Virtual Economy Gamification Tips)
2. Economic Impact vs Game Impact (Virtual Economy Gamification Tips)
3. Free-to-Play vs Pay-to-Play (Player-Centric Gamification Tips)
4. In-App Purchases vs In-Game Purchases (Virtual Economy Gamification Tips)
5. Microtransactions vs Macrotransactions (Virtual Economy Gamification Tips)