I think OP really not aware about use report to moderator button. Promote referral is against forum rules and it will handle by moderators. I don't think red tag appropriate for promote referral if that is no scam or malicious. So next time please use report to moderator button and write your comment. For better explanation you should know how to report.

Please read this guidelines; [Guide] Reporting effectively , I hope it will help you understand how to report. And create a new thread for such as reasons.