Absolutely. Anything you can contribute would be an improvement. If you see a shop that’s not on the map, and you don’t have time to add anything but a point showing that it’s there, add it anyway. An approximate point in space with a name attached to it is good enough to get directions to, and getting directions is the reason I open OSM like 90% of the time. And it can always be expanded on later by people with more time and specialized mapping skills! Don’t be discouraged by the massive effort some mappers go to, just add what you can because everything you add is useful to someone

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Different people don’t like it for different reasons. Some people don’t like it because they think it has CIA financial backing (nope), and some people don’t like it because it requires your phone number, therefore it is not private (the privacy it provides is more than sufficient for anyone not actively being persecuted by a Five Eyes state), and some people don’t like it because it feels corporate (it’s a 501c3 nonprofit, and how corporate it feels is subjective).