As explained the feature is coded as is and works as it was designed. It says MAX ADS and this is exactly what it means. This specific usergroup no user can have no more than X amount of ads on the system whether sold or active.
Everyone is quite welcome to discuss in the mod forum how to modify the code to suit your specific needs which is what I have said all along. This thread explains quite clearly how the feature works and has been answered.
I result anymore discussion on this matter can take place on the mod forum which has been linked on my last post.