If the ratings continue to slide they will go the route of the Miss America show and get knocked off a major network. Or maybe they will have to change the procedure so now viewers can vote, like with American Idol. If we are lucky though, maybe they will just stop airing the show altogether!
Being a crew person who works live televised events (sports & entertainment), I am familiar with the cost of putting a telecast like this on the air, and my estimate is (conservatively) that this costs the producers at least $250,000.00 based on a three-day window (two setup days and the telecast day). If they used more days for set up, that would add on to the price.
Now, I have no idea what they charge for commercial time (certainly more than the average TV show but nowhere near the Super Bowl), but if they continue to drop year to year in the ratings, they will be hard pressed to make any money by selling time to sponsors.
I'd give it another year before they move to some obscure cable channel like Oxygen.