User blog comment:B214/Volume 22 spoilers/@comment-182.58.115.129-20161117141023/@comment-10330822-20170101013955

It's not really stated in what capacity she is a secret judge or administrator. Since Ajuka effectively runs the Rating Games, and she works for him, she might just be a liaison or advisor on issues that he can't be there to view himself. In which case, its not really illegal for her to participate, she has no control over the games themselves.

Besides, even if that was the case, I don't think the Azazel Cup is the same thing. If she isn't a part of the actual judge staff, it can't really be stated to be a conflict of interest.

In fact, some of us suspect that might be why Bina is getting such good reviews, but she knows what the judges typically look for.