maybe something like this....

We need to name these in a way that won't be blocked by ad blockers. mdi-ad and mdi-advertisement may not display on some devices.
Gonna be tricky... I saw ad blocker rules blocking everything prefixed "ad".mdi-a-ds would be odd, maybe mdi-promo?On the other hand, we already have icons named adchoices, adjust and adobe...
See also Google's youtube_ad icon:
There's a potential language conflict here, though, but I don't know how we'd get around it. Google have a few other options but none really work to express an ad.
Isn't that AD icon for audio description?
At this point, I feel like we should just add these two. @Templarian?
Sure, worst case they don't render for webfont users. nbd.
Use advertisement for the name?
None of these convey "ads" without words.
Most helpful comment
See also Google's
youtube_adicon:There's a potential language conflict here, though, but I don't know how we'd get around it. Google have a few other options but none really work to express an ad.