It's not ads vs. no ads - it's who controls your device / PC screen
So: They are trying to make illegal something the device USER just has an *option* or ability to expand and cover their page.
If they win against google, what's their logical next step and progression from that - ban phone alert banners & system popups that "deface" their pages?
Or ban tab selection that allow you to switch between their page and a competitors?
What next? Remove the option to exit the browser or go to any other page, once theirs is being displayed??
It's the browser/device users choice to have something else displayed, not any web site owners right to _force_ a user to see a specific thing and nothing else.
The whole concept needs stamping out before such things get any toehold.