Dmit 换ip要花钱吗

我dmit的服务器被人cc攻击导致流量跑光后发起工单申请换IP，以下是服务商的回复： It will cost you 5 USD if you want us to replace IP in this case. Should you have any further inquiries or are in need of any assistance, please do not hesitate to contact us. We are looking forward to serving you. Best regards, Senra Technical Support Team DMIT Inc. 所以说是只有ip被block能申请免费更换ip吗