There are companies who if you submit a negative post about, within short order the post is pushed out of view of the top pages.
This is just another way of saying that a critical numeric threshold of users didn't like something. Framing the opinions/actions of groups of people on the internet as conspiring or dog-piling is a fallacy. E.g. if a person Tweets something that a million people read and a hundred of them reply to disagree, you'll often see that person follow up with something like, "wow, now all these people are attacking me", even though everybody acted in complete isolation and did nothing strange or harmful individually. Nobody rang a bell in the town square and handed out pitchforks. The internet breaks human psychology.