Bubble | Shooter Game [hot] Free

| Model | Mechanism | User Experience | Profitability | | :--- | :--- | :--- | :--- | | | Mandatory 15-30 second video ad after every 3-5 failed levels or as a "continue" option. | Disruptive but optional. | High volume, low value per user. | | In-App Purchases (IAP) | Sell "power-ups" (aim-assist, bombs, color-changers), extra lives, or coin packs. | Non-intrusive; enhances but not required. | Very high from "whales" (5% of users). | | Subscription (Rare) | Monthly fee removes ads and provides unlimited lives. | Seamless but high commitment. | Low adoption but stable revenue. |