While Collection M has gained a significant following, it has also faced criticism and controversy. Some have accused Ullu of pushing the boundaries of taste and decency, while others have raised concerns about the potential impact on younger audiences. However, Ullu's creators argue that their content is intended for a mature audience and that they take necessary precautions to ensure that their shows are not accessible to minors.
While "Collection M" serves as a thematic grouping, it typically features several of the platform's flagship titles that define its "Unrated" identity: Collection M -- Ullu Unrated Web Series