IP Bans are usually pointless. Not all ISPs give a connection a static IP or even solely an IP (DSlite). The reason is they don’t want private people hosting stuff and generating more traffic and they can charge you more. My ISP (Vodafone Cable in Germany) didn’t even gave me an IPv4 to use (it’s called DSlite/Dual stack lite), meaning I was behind a NAT on their end and many shared that IP. I did ask them nicely if I could get a real IPv4 for certain stuff and they gave it to me, but only when I book the upload boost for 5€ + a month. It’s not static but it only changes when my router is disconnected for a long time (I don’t know the exact time but at least several hours up to an day).

So usually an IP ban makes only sense for a limited time or specific ranges from companies (for example VPNs or hosting services that don’t care who books their service).