Gate is a cryptocurrency exchange platform that enables users to buy, sell, and trade digital assets. In some cases, Gate can disable deposits without prior announcement. This is generally done in order to protect users and their assets, as well as to ensure the smooth functioning of the exchange. This could be due to urgent maintenance, such as the implementation of a new security system, or to address technical issues that may have arisen. Additionally, Gate may temporarily disable deposits in order to protect users from potential risks, such as a sudden surge in the price of a certain digital asset, or to protect against money laundering activities. By disabling deposits, Gate can ensure that users are not exposed to any unnecessary risks and that the exchange is running smoothly.