This lack of transparency should bear moral responsibility for the following reasons： - **Violation of personal privacy**: Without the user's express consent, the use of new technologies to predict their behavior patterns and use them for commercial purposes seriously infringes the user's privacy. Everyone has the right to keep their personal information and behavior private, and this opaque approach deprives users of their right to make their own decisions. -**Violation of the principle of good faith**: Business activities should be based on good faith. Concealing from users that the behavior pattern is used for commercial purposes is a deception of users and destroys the relationship of trust. In the long run, it will damage the credibility of the entire industry. -**May lead to unfairness**: Users' behavior is exploited without their knowledge, which may affect their consumption decisions and cause them to be in an unfair position in the market and unable to make rational choices based on complete knowledge. -**Ignoring user rights and interests**: Focusing only on commercial interests and ignoring user rights and interests does not meet the basic requirements of ethics. Companies and developers have the responsibility to respect and protect the legitimate rights and interests of users. This lack of transparency is just the opposite.