What is the purpose of the free calligraphy class in Wei Gufang?

I am a student of Gu Wei Fong's elementary class. I think it is normal to pay for knowledge, and I can learn a lot. I think their teaching system is complete and the teachers are responsible. I have taken several public welfare classes, and some teachers are very ordinary. Maybe they think that the group is big and has everything, but on the whole, the teachers are still very responsible. Moreover, the teachers in the elementary class didn't force us to sign up. We all volunteered. I think many people on the internet say that they are teaching under the guise of public welfare, but the people's public welfare teaching has been insisting. As far as I know, there is no calligraphy teaching institution online that can teach for two months for free, and people lack enthusiasm. I think it is still very helpful to me.