As humanity progressed, this included various ad networks and other human beneficiary systems. Today, it's all about blocking the anti-ad blockers. :-\
I've been amazed over the years tho how some friends and colleagues let this crap through. My wife, for instance, using Yahoo mail would stupefy me on how she could concentrate on writing emails when there are banner and tower ads animating and annoyingly blinking on the periphery of their ui.
As a software developer/creator, having shit all over the screen going apeshit with animations and visually assaulting assets, was just to much for me from the beginning.