Possibly because the category is already filled by an existing member. You can check our Member Listings to see if one of your competitors is already in the club. If that is not the case, then we simply missed your category when we created our list. The good news is that if you will contact us and let us know what category you are wanting to represent, there is a very good chance, we’ll make that category available and let you know that you can apply to join under that category.