收到信件通知，本來在 GCE 上使用的 Public IP address 是免費的，2020 年開始變成要收 USD$0.004/hr (Standard，約 USD$2.88/month) 或是 USD$0.002/hr (Preemptible，約 USD$1.44/month)：
First, we’re increasing the price for Google Compute Engine (GCE) VMs that use external IP addresses. Beginning January 1, 2020, a standard GCE instance using an external IP address will cost an additional $0.004/hr and a preemptible GCE instance using an external IP address will cost an additional $0.002/hr.
從 2020 年一月開始生效，但是前三個月會用 100% discount 的方式呈現在帳單上 (所以還是免費)，這樣你會知道你的 IP address 費用會吃多少錢：
We will fully discount any external IP usage for the first 3 months to help you quantify the impact of these pricing changes. Please take note of the following dates:
January 1, 2020: Although your invoice will show your calculated external IP-related charges, these will be fully discounted and you will not need to pay these.
April 1, 2020: You will need to pay for any incurred external IP-related charges shown on your invoice.
其實整體成本應該是還好，但看到漲價總是不開心... XD