I contribute to both, and use both. It's possible to find value from both for different reasons, realise they excel in different ways, and my contributions to

I contribute to both, and use both. It's possible to find value from both for different reasons, realise they excel in different ways, and my contributions to each reflect my use of each. Into Google I add/update business opening hours, locations, photos of the inside of a shop or space, reviews of the produce or service on sale (with more positive reviews than negative). These are the things I find of most value when I travel to another area or country. Into OSM I add/update paths, geographic features, detail on the ground. Things that aid navigation, location, a more factual rather than subjective view of the world around. These are the things I find most of value when I am travelling or researching history and wanting more factual information at a fine level of detail about a collection of places (an area). I find no contradiction between contributing and using both, because my reason for using OSM and Google services does not boil down to ownership of data. That said, there is an area in which I actively promote OSM... cycle navigation. The Garmin maps are exorbitantly priced and always out of date. I promote (on over 300 cycling forums that I run) the use of Open Cycle Map, the ability to load these for free onto a Garmin, and the quality of them across most of the world. But then... you didn't mention Garmin ;)