Cartesia trains on your content by default. You can refuse — but only by filling in a form, and only for what you send afterwards.
“You may request that we not use certain categories of your Content to train our models by completing this online form .”
Paste this where the card should sit. It is the live verdict: if the grade changes, the card changes. It loads nothing from anywhere but this site and sets no cookie.
Editors that support oEmbed (WordPress, Ghost, Substack and most newsroom systems) can paste the entry's address instead, https://isittrainingonme.com/app/cartesia/, and get the same card.