You pay with your data.
This could very well be the long-term plan with DeepSeek, or it could be the AI application of how China deals with other industries: massive state subsidies to companies participating in important markets.
The profit isn't the point, at least not at first. Driving everyone else out is. That's why it's hard to get any real name brands off of Amazon anymore. Cheap goods from China undercut brand-name competition from elsewhere and soon, that competition was finding it unprofitable to compete on Amazon, so they withdrew.
I used to get HEPA filters from Amazon that were from a trusted name brand. I can't find those anymore. What I can find is a bunch of identical offerings for "Colorfullfe", "Der Blue" and "Extolife", all priced similarly. I cannot find any information on those companies online. Given their origin it's safe to assume they all come from the same factory in China and that said factory is at least partially supported by the state.
Over time this has the net effect of draining the rest of the world of the ability to create useful technology and products without at least some Chinese component to the design or manufacture of the same. That of course becomes leverage.
Same here. If I'm an investor in an AI startup, I'm not looking at the American offerings, because long-term geopolitical stability isn't my concern. Getting the most value for my investment is, so I'm telling them to use the Chinese models and training techniques for now, and boom: it just became a little less profitable for Sam Altman to do what he does. And that's the point.