OK so I realise the core use case is where there is no internet.
But actually, there are many places where the problem is affordable internet.
I spotted this service Which includes a free tier for global use (up to 1Mb)
They seem up for their services being used to request content for outernet https://community.hologram.io/t/dev-cards-human-restriction/1648/2
So the addition of a $15 sim dongle and a bit of software magic might be an interesting add on for some use cases…