In general, my sense of the US national security state is that it will often first ask nicely for the things it wants. They don’t make open threats, because they want you to consent freely and enthusiastically. Threats would undermine that spirit of collaboration, and they would also potentially enable the person being threatened to brace for whatever is threatened, undermining the effectiveness of the threat.
If you decline, they will then prioritize going about getting what they want using an assortment of coercive means. Sometimes, you may find that were high enough on the list to be asked, but not high enough to warrant coercive means sufficient to get what they want at the present time.
Other times, some variation of this happens:
“I think you should come work for us, there’s a lot we could accomplish together, you just need to do some things for me” “And if I say no?” “No pressure, I’ll just call my boss and say you said no.” “That’s it?” “What happens after that isn’t up to me, but they probably won’t have me ask again.”
Imagine how it goes when “we don’t want someone who declines to help to know that we’re interested in the substance we asked about” is added to the list of government priorities.
If you replace the words ‘frontier AI’ with ‘fossil fuel’, switch the companies to Aramco and Total, and post this in a climate change community, the post will still make sense.