We use OpenStreetMap data for all roads - for some political boundaries and labels, you've got to bring in some other open data sources to make things look dece

We use OpenStreetMap data for all roads - for some political boundaries and labels, you've got to bring in some other open data sources to make things look decent. Copyright on this rendition of the maps is MapBox's, data is OpenStreetMap's - that distinction is cleared up by their licensing. Besides that, the relationship is that we contribute, with a lot of hours, to OpenStreetMap's data & code, and try to get more visibility for the project. There's very little official about OpenStreetMap, so it's not like anyone has a title or secret plans.