Why are countries where people can't pay $1 per year at all relevant to a discussion on software products? If India and Malawi and whatever other country can't

Why are countries where people can't pay $1 per year at all relevant to a discussion on software products? If India and Malawi and whatever other country can't pay for WhatsApp, they don't get it or Facebook makes it free just for them. Or they find a way to make the ones that can pay do so. What's the big deal?