Content streaming platforms treat the balance between mainstream and niche content exposure as an explicit recommendation objective, promoting diverse content to serve varied user tastes while also supporting a healthy creator ecosystem. Fair exposure and monetization for content creators is listed as a distinct optimization goal, separate from pure engagement maximization. This means a well-designed streaming recommender is not solely optimizing for what the majority of users click on - it incorporates creator ecosystem health as a parallel objective. Platforms that ignore this balance risk concentrating traffic on a small slice of their catalog, which can reduce long-term content diversity and creator participation.