It's a SIM to enable IoT devices to connect to (almost) any available network. It is not cloaking the origin of the data, or even if it is, that's not why companies will buy this.
That's what a virtual private network is - an overlay on transport networks to allow a group of devices under the same ownership to communicate. While VPNs are often used to cloak IP addresses, they were originally a corporate thing. Your in-house net could be transported over the public Internet while keeping its in-house address space and some degree of privacy.
It's a SIM to enable IoT devices to connect to (almost) any available network. It is not cloaking the origin of the data, or even if it is, that's not why companies will buy this.