If you're using eBay, they updated their Terms of Services, and you're now auto-opted-in to have your data used to train AI. To opt out, use this link: https://accountsettings.ebay.com/ai-preferences
Dark pattern: if you're already logged in, you can navigate to the AI preferences page, and it shows you the toggle to opt out. If you click it, you're challenged to log in (okay, changing major account settings is a good excuse for this).
However ... after logging in, your setting hasn't changed - it hasn't actually reacted to your action to opt out. You have to toggle it again.
"AI" is a scam.