They are phasing it out but I'm going to escalate your issue to the Comcast corporate employees that are available to these boards. We've seen cases here where they have been able to get this accomplished for customers even when it is not listed in their rate cards, YMMV. You should get a reply here in your topic. Good luck !
Thanks for using the Xfinity Forums. I'd be happy to check your account to see if we add an additional IP Address. Can you send me a private message with your full name and service address? To send a message, click on my name "ComcastChe," then click "send a message.