Question about ratings

So for a long time now I've been keeping my Humor category unlocked but telling people to avoid rating it if they like. I have a silly reason for this, but it's not super important.

My question is, however, do I need 20 ratings in Humor for my game to be ranked, if I have 20 ratings in Overall? After looking at the rating section of the page I'm not sure. I am suddenly worried that I'm not going to be able to get a ranking due to my silly request.

I do not actually care about getting a ranking in the Humor category itself--but if it prevents me from getting a ranking in the other categories that is a real problem.