russpuppy
The Ludei itself admitted that they are having problems with the combination Ludei + Mopub, perhaps in the coming weeks leave some kind of solution, but I believe that will restrict the cocoonjs new version (2.0.1), which also has major problems compatibility with samsung devices (android greatest market share).
For what reason is not possible, Scirra develop a plugin to use the Admob directly? (I say this because it is the most used).
Perhaps the use of Admob SDK, be a hindrance, but it would be something so positive for the community it might be worth the bother.