I tested the admobfree and admobpro plugins in my two games but i had a very low impressions
For my first game with 40 to 60 downloads in day i got 35 to 70 impression ! normaly i should have 300 to 600
My second game when it was made with java/eclipse i had 1000 to 2000 impression a day , but when im rebuild it with construct 2 i have just 250 impression max with the same downloads !!!
i tested the games and all the ads shown normally.
Maybe the probleme is because i dont use the crosswalk ?
or the plugin hack my impressions ?