I recently joined a new site, so I get the joy of seeing ads again.
Inspecting the page also revealed no hint of any actual add container being present.
The HTML of the page does show the iFrame:
<iframe style="border: 0px none; vertical-align: bottom;" src="https://tpc.googlesyndication.com/safeframe/1-0-37/html/container.html" id="google_ads_iframe_/248424177/wordpress.stackexchange.com/lb/question-pages_0" title="3rd party ad content" name="" scrolling="no" marginwidth="0" marginheight="0" data-is-safeframe="true" data-google-container-id="1" data-load-complete="true" width="728" height="90" frameborder="0"></iframe>
but trying to copy the inner HTML of the iFrame results in nothing.
Inspecting that HTML element from within the inspector reveals that it has a height of 0.
Now I'm all for loading the page without making it jumpy, but there should be better use for this valuable real-estate then just white, right? Also the "Report this ad" button is fully functional, and I reported the ad (or lack thereof) successfully.
I am not deploying an ad-blocker or any userscript.
Browser: FF 68.5.0esr on macOS 10.14.6
Refreshing the page just lead me to the same. An empty add frame.