What is your view on the percieved over-use of

Surely, we understand that active downloading of map tiles overloads OSM servers. That's why we don't allow our users to download a huge map areas directly from the app and provide with the several alternative online map sources such as: CloudMade maps, MapQuest, OpenStreetMap, OpenCycleMap and OpenStreetBrowser.
Moreover, we recommend our users to exchange the prepared offline maps between each other in order to reduce the loading.
In future we plan to come out with the vector rendering within the app.