Don't think so, from what i've heard deepseek isn't loosing money on inference.

Do you have a source for your first claim?

My impression is that deepseek designed v4 specifically for cheap inference and they are not loosing money even at 75% lower price.

>they are subsidizing a huge amount of tokens at cost

This is absolutely false, because other providers serving the Deepseek models on OpenRouter are also able to offer very low prices, and they don't have the money to subsidize anything.