I think it's safe to assume at this point that all public content and most private content on the internet is being fed to both AI and American intelligence services.

And China. And Mossad...

Askimet is completely owned by Automattic (the corporate entity attached to the main author of Wordpress). And Wikipedia says this of Automattic:

In February of 2024, Automattic announced that it would begin selling user data from Tumblr and WordPress.com to Midjourney and OpenAI.[27]

27: https://www.404media.co/tumblr-and-wordpress-to-sell-users-d...

"Announced" may be too strong; the link is to an internal email leak discussing this possibility, but "Automattic may be experimenting with selling data to midjourney/openai" is still pretty close to "Automattic's selling user data". Hell, I can see the positive spin blog post announcing this: "They're also giving Automattic a bunch of free cycles on improving Askimet's spam/ham filters, in exchange for a look at every other comment anyone is sending through Askimet ever. We're aware this is a thorny ethical issue; click HERE for the archives of our mailing list dedicated to this project."

As for Palantir, my inner paranoid says that if the FBI/NSA/etc wants this data, they have some way of getting whether or not a deal with a public front like Palantir is involved.