подскажите за использование api maps + adsense

Да, второй месяц (за декабрь, январь) вычитают ~30%.

Подозрения на вычет всех кликов с IE по объявлениям около карт (но это предположение).

https://productforums.google.com/forum/#!category-topic/adsense/reports-and-earnings/r5AUZL6NsBQ

"These invalid clicks were generated by users who accidentally clicked on ads, specifically from users who have visited your pages with certain browsers. Users visiting with those browsers are experiencing issues with our ad rendering, which causes users to unintentionally click on ads when they are navigating pages that contain map frames that span the majority of the page and content. We are working on the ad rendering issue internally, and should have it resolved shortly.

To ensure that users don’t accidentally click on ads within your pages, and to limit the discrepancy you see between your estimated earnings and finalized payment, here are some recommendations for ad placement. On pages with map frames, we recommend placing additional space between the ad units and the map frame so that users can’t accidentally click on ads while navigating their map searches with their mouse. We suggest placing ads at least 150 pixels away from the map units."

Но гугл похоже сильно перестраховывается, во всех бразуерах все нормально отображается.