Why do national standards charge fees?

Similarly, the products of each physical industry have national standards or industry standards (hereinafter referred to as standards) based on them. These standards are the product of a country’s social wisdom and technological level, and the state is the organizer and implementation supervisor of these standards. These standards are part of the public resources taken from the people and used for the people, and are related to the development of enterprises and the improvement of people's living standards. The implementation of these standards is the basic guarantee for a country to promote social progress. In order to promote standardization more conveniently while ensuring the growing material and spiritual needs of the public, it is recommended that our country allow citizens to obtain these resources for free on the Internet and build an information platform for this as soon as possible. However, the current actual situation is far from satisfactory. Various related websites are charging fees. I wonder what their basis is? Is this an industry monopoly? If this is really reasonable, please ask the authoritative department to answer it for us.