@ironside
how do I find out if they have been earning money because they are not appearing with all the other custom channels.
Exactly how is hard to say because it depends on what exactly the ad units are and what you want to see. But generally you can filter the ads based on ad-units (common-reports) select the ad-units you want to see, click on filter. Then above the chart there is another filter field, click on "+add" and filter by platform. That should show you a specific ad-unit for only mobile users.
dynamic ads, what are these exactly?
I'm not sure, but I believe they are ads that do not have a specific size, they fit whatever the container is, a truly responsive ad-unit. A 300 x 250 ad unit can fit into 1 300 x 250 container on mobile, it the ad-slot resize to say 728 x 90 that ad-unit would not fit the slot, but a dynamic ad-unit could resize to fit it. That is what I think, but I am not sure.
@ivok
Anyone experienced ads with blue sky and clouds? Not clickable? What is this?
Yes, I see it all the time. These are ads that are geo-targeted, if the impression occurs outside of the geo area the clouds are shown instead of the ads. Since you are in BG, and many of your users are in the US, your users will see the ads but in the Ad-Review the ad is replaced with the clouds because you are not in the US. I find this really annoying because you are blocked from seeing the ad. I mostly see these ads from big brands, Disney and Lowes. If they are from reputable brands I let them pass, but if I don't recognize the brand/URL I block the ads.