关于酒店的取消条款

在venere.订了一酒店Hotel Versailles - Rome,当时没看仔细条款,潜水回来后发现信用卡被扣钱了才看清楚这个取消条款,"You may cancel your reservation without penalty up until 30 days before your arrival date, by accessing the Your Reservations page. You cannot cancel your reservation if you selected and booked a non refundable or prepaid rate" 为什么会有提前30天才可以取消?我订酒店那刻起到入住间隔29天,所以我只要一订就不可能取消.酒店为什么不直接简单的限制不可取消,害的我一粗心订了.我很疑惑,这种提前30天才可以取消的酒店多吗?