The main assumption in the article was that people who voluntarily create maps (like I did) only care how much people they reach with the product of their work.

The main assumption in the article was that people who voluntarily create maps (like I did) only care how much people they reach with the product of their work. And if that would be the case I would have chosen google map maker because absolutely everybody uses google maps. Google maps does not have a free data api, but that is completely irrelevant for this argument since nobody 1) uses that anyway. 1) Only a negligible fraction of people using maps.