This is not intended for direct use by consumers. This is intended for devices that require internet connectivity, but might not have reliable access to a WiFi or wired network.

Examples include: fleet management vehicle trackers, meteorology sensors, centrally controllable streetlamps

These are commonly referred to as Internet of Things (IoT) applications.

These devices typically use a very small amount of bandwidth (relative to a mobile phone user) but need the reliability of being able to roam across multiple networks. Hence the relatively steep $100/GB.