Which of the following options is NOT a subscription notification required for US compliance?

The option that is NOT a subscription notification required for US compliance is related to announcing new features. While keeping customers informed about features can enhance user experience and satisfaction, it is not mandated by compliance regulations concerning subscription services in the U.S.

On the other hand, notifications regarding price changes, whether increases or decreases, are essential for transparency and to comply with regulations such as the Fair Credit Billing Act. Informing customers about the end of a trial period is also critical, as it allows users to prepare for potential charges and makes certain they understand their subscription status. These notifications align with the principles of providing clear communication and ensuring that customers are fully aware of how their subscription terms may affect them financially.