IANAL and this is not legal advice, but to explain the issue further in a number of countries training is considered fair use. If someone training the model can find one country where this is the case (and there are no edge case issues from things like copying the data for training) training is legal. So far, the US hasn’t restricted importing models (which specifically for open source might not be possible due to free speech) so using that model in the US is legal as well.

And understood that there are strong opinions on both sides of the argument if this is good or bad.