Huh, I was using Ubuntu as my daily driver circa 2014 and I don't remember this at all... maybe I stopped just prior to them implementing it... or maybe it just didn't make enough of an impression for me to notice.
Yes, and I don't consider that an "easy to disable" option for regular users, but that's just my opinion.
"Easy to disable" is also the wrong approach, IMO. It should have been "easy to enable" - stuff like this should always be opt-in, not opt-out. Opt-out, to me, demonstrates a company's motivations more than anything else.
It could have been earlier? i tried Ubuntu around 2012. I didn't know how to get rid of the Amazon stuff, and it turned me off Linux...thinking why use this OS that is ad based....wasn't till 2017 when W10 made our computers slow that I tried linux again.