This comment discusses the different ways we are considering addressing this issue, and provides links to more specific issues that cover specific steps towards this issue: #12114 (comment)
We are working on some of these today. Please see the individual bugs for details.

Both Firebase (AdMob) and Facebook support a "Native Ads" format:

• https://developers.google.com/admob/android/native
• https://developers.facebook.com/docs/audience-network/native-ads/

Native ads are rendered inline with the app's content, with rendering and formatting (colors, fonts) controlled by the app itself.