It seems that such areas are underserrved because they can't afford it.
Define can't afford it. Let me give you a couple of examples here in the US.
The company where I work has a horribly incompetent local telco. When they first bought their wires from Verizon, they came out and talked to me about high speed internet. Five years later, they can still only figure out T1 lines. There is no cable available the industrial park where we're at. I once looked into it and Charter and Comcast couldn't figure out who would actually service my area (each saying it would be the other). I think they finally settled on Charter, but with a huge build-out cost (somewhere around 30k if I remember right). A few years later, a Charter sales guy popped in to find out if we were interested in buying their service. I told him I absolutely was, but there's no way I could afford their build out cost. Supposedly they're trying to find enough potential customers to justify their build out cost, but here we are almost two years later and no service. We can easily afford the service. Even at $1,000/mo I can probably get it approved. But we can't (won't) pay that build out cost.
I also like to go camping in a semi-remote area. It's not real camping. We do it with a travel trailer on a seasonal site. Full plumbing, full electric, etc. But it's still enjoyable. They've talked about putting in Wifi, but there's no broadband of any kind available. Again, build out costs are going to be the issue. I doubt they'd pay $1,000/mo for service, but I'm sure they can afford something like 100/mo.