I get your point, but the cost of the phone and mobile data to actually use whatsapp has a lower limit as well. Even if you use whatsapp on a $50 phone (which

I get your point, but the cost of the phone and mobile data to actually use whatsapp has a lower limit as well. Even if you use whatsapp on a $50 phone (which you use for say 5 years) with a $3/month plan (which seems incredibly cheap), you have amortised costs of $46 per year. Increasing it to $47 to get whatsapp does not seem as unreasonable as you suggest. Malawi is also an _extremely_ poor country, for reference Bangladesh have ≈ 5% smartphone usage with a GDP of ≈ 4000 USD per capita (PPP) while the GDP of Malawi is ≈ 1000 USD (PPP) per capita. I would argue that not paying (but having the means to actually use whatsapp!) is more of a choice, or lack of payment infrastructure, rather than not having the disposable income to spend 1 USD per year for the service.