The idea is to take as much of the boat out of the equation as possible so that it is sailor against sailor .....
Thanks for the info, Jake. I had wondered why the Worrell 1000 and the Archipelago did the same. It does make sense now. I guess I was wondering if I wanted to enter the Nationals every year, if I would have to purchase a different boat every year to do so.
This is different than a nationals (or the Tybee or Worrell) - For the US Multihull Championship the manufacturer provides 10 new boats and you have to qualify through an area qualifier (using your boat of choice as long as it has a valid Portsmouth number) or petition for a sailing position in the event based on your sailing resume. Cost to the sailors is relatively small and does not include any charter fees (US Sailing takes care of that).
For a typical nationals, you pick whatever class you want to sail in and buy that boat and bring it to the nationals. Most, if not all, nationals are open to everyone with that particular boat.