Could we possibly have a poll for the forum users to vote on the most used/popular ad networks they use, or would like to use, with their Construct 2 apps? Scirra can then use this to determine what ad networks can be added as plugins.
I really find the lack of easy-to-implement ad plugins within Construct 2 frustrating. I even bought cranberrygame's plugins, but never managed to get it to work. His support isn't to great either.