Only problem is if you can't go to Cal Expo and bet it in person or open a Twin Spires account, you are out of luck on this promotion. In NJ, you are forced to use NJAW so if I pick it right, I get zero bonus. That being said, it may be a good way to get some people to show up on track.
Join the tea party and use an out of state address. They can't restrict you from such lucrative wagers.