Is money earned from working on the purification of pornographic content, by answering yes, no, or I don't know, permissible, with the possibility of abstaining from answering and passing it on to others, and knowing that payment is made for each report?

Your work is beneficial and reduces evil, and your earnings from it, God willing, are lawful, because it is a form of enjoining good and forbidding evil. We hope that you will combine reward and wages if you intend to دفع الشر عن المسلمين (ward off evil from Muslims). Be sure to limit yourself to what repels evil, and do not delve into watching or complete viewing if you know that the content is pornographic or forbidden.