Hi,
Hotlinking can be prevented. You can block resources like video files, images, CSS files, JS files etc. But if the user has scraped some content like text or links that cannot be removed because that are saved on their servers.
Basically all the stuff that is currently on your site and other website is accessing it on every page load from your website, then that can be stopped only.
Please share your website URL and the URL of website(s) stealing your website assets.
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Thank You and Good Luck for your Project.
Imran Ali.