Leave a browser open and update. This is called stalking and it is the only way you are going to get anything. You could put in waitlists for rooms that are common, like SSR/Kidani studios. Check the room inventory to make sure you are booking a category with a lot of rooms. My Poly even came though for marathon weekend.
The 30-ish day mark is very important. People will drop reservations a few days before the points will go into holding.