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.