The answer is simply that no one would pay to use them for a number of reasons including privacy. They have to give them away and put up some semblance of openness. No option really.
And how would releasing open-weight models help with that? Open-weights invite self-hosting, or worse, hosting by werstern GPUaaS companies.
It’s true that DeepSeek won’t give you reliable info on Tiananmen Square but I would argue that’s a very rare use case in practice. Most people will be writing boilerplate code or summarizing mundane emails.
Deepseek 3.2 is 1% the cost of Claude and 90% of the quality