Releasing open weights have been basically a PR move, the moment those companies need to actually make money they will cut it out as that reduces their client base.
They DO NOT want you to run AI. They want you to pay them to do it
z.ai did go public on the HK exchange. They are under pressures similar to other public companies.
I know that China models are increasingly being trained and run using Huawei chips instead of Nvidia. I know China has a surplus of electricity from renewables (wind, solar, hydro).
So, it makes a lot of sense to get people a "demo" and claim the paid product is better.
i think a lot of people have no idea how capable local models are atm.
The AI landscape in China is larger than just Qwen and Alibaba.