those rules should not apply because they would eliminate the methods the carriers use to notify customers of service changes and upgrades
No they wouldn't. If the ISPs can't put together a mailing list (or Twitter. or a status page.) of their own customers, they are unfit to be calling themselves an ISP. Yeah, they're probably running it out through Mailchimp or similar for convenience; but if they can't do it themselves on their own damned network then how good are they going to be at the rest of it? *donk donk* Case dismissed. Lucky for whoever came up with this pearl that I'm not a judge. I'm *this* far away from adding contempt for thinking about arguing.
Informing your customers is an entirely different thing to 3rd-party spammingmarketing.