Credits on maps

Is there a way to use a screen credit (one per screen) not a map credit (one per map/tile) if the maps are created as tiles?

Use case: tile service within WorldWind framework

We're displaying the data possibly on a globe using WorldWind (3D effect, not a flat map).

We're about to use the XYZ tile layer, but it's going to disapeat at some point (https://developer.mapquest.com/forum/downloading-map-tile-offline-use#co...).

Therefore we're requesting several tiles for a single display. It works fine (present).

If we go the static map API, I can convert the XYZ calls into static map calls.

But I don't see a way to remove the credit.

Credit is fine, but once on the map, not on each tile.

Is there a proper way to do this? Ugly way: request a bigger map as crop it ;-(. More work on MapQuest servers, more work on the client side too.