Nothing is truly free in this commercialized world.
Using Facebook and Google products are supposedly costing you indirectly, where information about you, i.e. interests, behavioral tendencies etc. are analyzed, aggregated and sold to third-parties that will end up tailoring advertising to make you buy.
In the end, you end up spending more than if you just avoided these "free" services.
RE: Pokémon Go a year after the hype. Are the privacy issues still a concern and how does a free app make money?