They may not see the economic value of releasing models for free and then hoping that you'd use their API. Once they catch up more to US models, they will inevitably go closed source. That's my prediction.

I could see a much more restrictive licensing agreement before going full closed source. It could be a scenario where hyper scalers such as AWS or Azure will gain far more value from free Chinese models than Chinese labs such as when AWS often gained more than for-profit open source software than the creators.