My ISP, Metronet, is mostly CGNAT. That broke some things for me, so I called in and they gave me a "free" static IP to fix it. Except, once per year they start

My ISP, Metronet, is mostly CGNAT. That broke some things for me, so I called in and they gave me a "free" static IP to fix it. Except, once per year they start charging me for it and I have to call back, and then they make it free again.