The hotel's quick action in response to a serious situation was likely due to CYBER SECURITY BREACH. It is a threat not only to the customers but to the hotel business as well because with this breach, customers will find it hard to trust said hotel again.
Because confidential data like credit card information were stolen, they need to immediately inform their customers to ensure that the customers will take the necessary steps in protecting themselves from having their identity stolen and from having their credit cards used in purchasing items they are not aware off.