If you enter the calligraphy association at a real level, it means that your calligraphy level has reached a higher level, which represents your strength. As for the benefits you mentioned, we have participated in some activities sponsored by the Book Association, and members of the Association can watch and participate for free, instead of paying. For example, we used to be able to enter the library for free with the membership card of the book association, but now it is of course open.
In addition, if you improve your social status and others ask you to write, your reputation can also be improved. This is from a commercial point of view. I don't know anything else, hehe! I am also a calligraphy lover!