I could have 2 ads for each position, one desktop and one responsive, however google will not like this. Currently most ads positions are reponsive. It does not work for you?
the bad thing with responsive theme is that you do not get the same revenue as you take with separate mobile site.
The reason is PPC programs have different code for popunders and banners for mobile sites.
an example: mobile popunders pays 2$-2,2$ CPM and desktop pupunder 0.9$-1$ CPM.
So with responsive theme only you will lose 50% of your revenue.
As we can see all big porn site have also mobile site only for this reason.
The only way is to make a code that will detect mobile only for ads.
Yes, but if you display different stuff for mobile vs desktop, google will not like this. Detecting google is not so easy? (you can use the dns resolver to detect
all google bots, however this takes time for each request).