Every such provider likes to play games with who they give good rates to or who they exclude altogether from their network. People said the same about cellular access and it's still far too expensive for most people in most rural areas.
Which countries are you referring to? I know from personal experience everyone in Cambodia and Afghanistan owns a mobile phone with internet access. They might not have a computer or reliable power, but they have Facebook accounts. Rest of ASEAN has excellent coverage as well, and I've heard Africa is similar
