It is targeted at a dozen or so people at OpenAI and Anthropic, not you or me.

Then why is it published on a public website?

Where else would they publish it?

If it's intended for a global audience of 12, just send it to them. No need to publish.

And how do you know who they all are?

It seemed implied by knowing one of two employers and the estimated total size of the population. I could have been wrong.