What is the ruling on earning profit from file-sharing websites that determine a profit for every 1000 downloads, knowing that the website's sources of income are premium memberships, special advertisements, and filtered AdSense advertisements?

The determining factor in dealing with websites is their content, how they are operated, and their conditions. It is stipulated for the permissibility of working with them that the uploaded files be permissible, and the website be legitimate and not promote illicit things. If these conditions are met, then there is no objection to cooperating with it and taking payment for that.