Game developers can charge players for virtual goods like power-ups, character customization options, or access to special levels. Gacha Mechanisms and Temsatta.com.porary Promotions. To make gaming more seamless and pleasurable for players, in-app purchases can also be used to unlock premium content or get rid of advertisements. With gacha mechanics, which allow users to spend virtual currency to receive random rewards, in-app purchases can also be effectively utilized.