@stéphane-de-greef The moderator supports only Google Maps, we are using Map Box in the Tools section so we mitigate the usage cost Google Maps API has.
I understand your point. The thing is right now our focus is not on the Moderator but on the Overlay Editor, and we have no idea when we will go back on the Moderator. But when that will happen allowing you to switching between OSM and Google will be an option.
