Google is a large company, with multiple branches. I can't remember what services it is now, but there was some Google service that was deranked because it bro

Google is a large company, with multiple branches. I can't remember what services it is now, but there was some Google service that was deranked because it broke some Google search ranking policy. It shows some integrity for the company that they're (sort of) operating their search engine objectively. I presume that google doesn't uprank sites that specifically use Adsense versus other competing ad services?