Google managed to dance the knife edge there for a lot longer than most though. AdWords made so much money in a fairly unobtrusive way, that they were able to scale it out without pissing a lot of people off. That and it was actually even sometimes useful.

They clearly decided to just say "fuck it" though. Sometime after Ruth Porat replaced Patrick Pichette and especially after Sundar took the helm (both happened while I worked there) but most especially in the last 3 years.