Depop's policy never uses the word "train". Its help centre says its recommendation systems "learn your interests" from what you view, like and buy. Neither says whether…
“In some cases to protect our Service, this detection and enforcement takes place automatically using machine learning tools (such as in the case of detecting fraud, phishing, commercial spa…”
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/depop/, and get the same card.