I think the misconception here is that they "give them away".

Sure, you can download the weights and run it yourself, but to run a 1T+ parameters you need roughly 2TB of VRAM (for full precision). That costs around $500k to $1M, not including electricity and rent.

In reality, they provide their models priced via API or subscription just like any other company. The "free weights" are only useful for other research labs. It seems that China understands that research should be shared and open, which is one of the reason that AI has been able to develop that fast in the last 10 years.