There’s heaps of vids on yt about the MacDonald’s ice cream machine racket.

https://m.youtube.com/watch?v=SrDEtSlqJC4

I get no ads when visiting facebook on a desktop browser. I'm running ublock origin, I also used a tool (which FB promptly cease and desisted) which unfollowed everything I'd ever followed over the years.Then finally a while back I spent a night clicking 'hide ad' on every sponsored post which appeared in my feed.

The combination of those three things has made it FB doesn't show me ads anymore. I just get posts from friends and groups I choose to follow. Kinda like it was in 2007.