How poor are people that a low cost email service is too expensive? $5 a month for Europeans or Americans would be nothing. Think how much poor people spend on stamps.
In many cases is the expectation of the service being free…
If someone told you that checking the weather app is .50 usd per query, you probably would try to find a different alternative, as you expect it to be free.
well then however they are affording a mobile phone and the monthly service, they can probably figure out how to pay $5/month for email if they don't want to use one of the free options.
People can have an older phone, given free, cast off by people buying the latest-and-greatest, and use public wifi for everything. The phone can literally be free.
If someone told you that checking the weather app is .50 usd per query, you probably would try to find a different alternative, as you expect it to be free.