Yes, Google, Apple and other big companies use power of crowd in order to massively collect data. This approach as also known as crowdsourcing. It's applied to gather info about Wi-Fi/Bluetoth access points that's used then to refine positioning accuracy in their maps. But it hasn't been applied yet to perform visual mapping. and I think PokemonGo is a big step toward this direction!Thanks @deepbits for such an interesting facts.