Does Greentree Inn have to make up the difference every day after the group purchase?

It should be said that if your group purchase price is high, the price will be reduced when you check in, and the merchants will refund the difference to you ~ If your group purchase price is low, the price will increase when you check in, and the merchants will let you make up the difference ~ For example, you usually raise the price on holidays, that is, you have to make up the difference when you check out ~