Facebook is free — it’s for everyone. Some other big tech companies make their money by selling expensive hardware or subscription services, or in some cases both, to consumers in developed, wealthier economies. They are an exclusive club, available only to aspirant consumers with the means to buy high-value hardware and services.
Facebook is free only because they sell advertising using customer data. Apple makes money from hardware and subscriptions. It’s precisely because of companies like Facebook and Google that privacy is seen as a luxury.