Ads also have a tendency to load at higher quality even when there are bandwidth restrictions on cellular networks. We're all being forced to watch 360p videos on our $100/month cellphone plan, but somehow everybody is aligned to give us 4k ads, and waste our battery and bandwidth.
It’s amusing but playing devil’s _ad_vocate: isn’t this just a sign of a really well-engineered e2e system? It certainly tells you where the most bullet-proofing (aka sev follow-ups completed) has occurred.