Its best not to overbid, because the hotel for the person that got it for $60, you might get the same one for $75, which can be foolish. You never know, because you can get a differant place for the same price. Lastly, chains aren't the only ones who participate, because its a lot of times up to the individual hotel. They want their occupancy rate as high as they can get it, because they would rather give you a $100 for $50, than have it go unused, which would be $0. ~JS