Google gets 100% of the revenue any time someone searches using Google. What's being discussed here is the amount that Google gives device manufacturers for them to set Google as the default search engine.
I doubt it, my phone runs LineageOS and strongly avoid closed source apps, browser is plain ol' default Chrome, computers are Linux, router is OpenWRT, IoT is on its own VLAN. I guess my ISP, CenturyLink could be doing some shady things. But otherwise, I doubt it. My server would be a much more interesting target, and is public facing obviously since I'm posting through it.
As for why no ad blocker, I use AdAway but it breaks some apps. I don't use any apps that have ads so it's limited to Chrome, which mostly gets used when opening links from Lemmy or IRC.
An ad on the page redirected me there before I could even touch the screen to start scrolling. The ad banner loaded and immediately redirected me there. Hitting back and clicking the link again on Lemmy a few times and I was able to access the site normally.