Final answer:
The Red Bull mobile app described in the question is a freemium app, offering free use of its basic features while charging for virtual goods to enhance the gaming experience.
Step-by-step explanation:
The scenario described in the student's question is an example of a freemium app. This type of app allows users to download and utilize the core functionality for free, but charges them for advanced features, additional content, or in this case, virtual items within the app such as virtual cans of Red Bull.
The model is based on engaging users with free content and then monetizing a portion of the user base that is willing to pay for enhancements to their experience or to progress further in the game. This is similar to the way platforms like Face_book have evolved, where initial engagement is free, but monetization occurs through in-game purchases and advertising, which promotes consumerism and brand loyalty.