Earlier quoted context omitted.
The device manufacturer will eat the cost of the 5G subscription, since it will likely be lower than the revenue generated from the harvested personal data.
How low can you get these ? Even at $5/month, that's $60... is a single user's data worth that much ?
So the cost will be minimal and further reduced by the bulk volume that the manufacturer would purchase from the telco. Like how Amazon Kindle comes with a free 3G connection to download your books and upload your reading habits.