Google has confirmed to Search Engine Land that it's dropped the additional useful links in SERPs from the info command operator. The useful links provided additional information such as Show Google cache Find web pages similar to... Find web pages that link to... Find pages from the site... Find web pages that contain the term...
Why send user to competition when they searched for terms you ranked high with?
They haven't stopped doing that, they have just removed a tool that allows users to choose to do it.
If you search for my (registered trade mark) business name, you still get a box with "People also search for..." ...all my local competitors.
Using my brand name to advertise somebody else's similar or identical services is trade mark infringement, but that hasn't ever bothered Google. It isn't personal, or picking on businesses that can't afford to fight it (for example, try searching for Apple, which has the same effect in the UK), but sooner or later someone who can afford to do it will probably sue them.