Not an illiterate person, but I am from India where we're seeing massive technological increase in rural areas (such as smartphones, tablets etc.)

When you're talking about people like these, they are mostly residing in a close circle of people who take care of each other. Remember the saying "It takes a village to raise a child"?

Well, in a lot of places, that is exactly what happens. In such an interdependent society, people help each other. The somewhat educated person helps people with documents, contracts, etc.

A skilled craftsperson gifts goods to the educated person.

The doctor treats the people from this close-knit community for free.

The children live with their parents until the parents pass away, and take good care of them.

In such a society, it's not each man for himself. It's everyone for everyone. In a society like that, internet doesn't really mean much. They have other ways of keeping themselves occupied. On the off-chance that they do need to access the internet, there's more than enough help around.

Hope that helps.