If they don't put the manufacturer names with the boats in the results, the individual manufacturers will put out their own press releases anyway (if they have anything to brag about), so the brand names might as well be in the official results for all to see. Better for the event to get an objective report than for the public to see only releases slanted to favor certain manufacturers.
I agree with this - we're going to find out anyway. In addition, I read that rule to imply that maintaining a "manufacturer scoring" system is not allowed. In NASCAR automotive racing, they have a "manufacturer's challenge" where a manufacturer (Chevy, Dodge, or Ford) wins based on their finishes over the season and I can see how the wording of the rule prohibits such a system. However, I don't see how the wording of the rule can be interpreted to disallow listing the type of boat next to the registrant's name.
I do, however, see how the class is trying to stay as far as possible away from ANY appearance to support one brand over another. The class makes a serious effort to maintain a blindfold when it comes to brands.