censor
/ˈsɛnsə/
noun
1.
a person authorized to examine publications, theatrical presentations, films, letters, etc, in order to suppress in whole or part those considered obscene, politically unacceptable, etc
2.
any person who controls or suppresses the behaviour of others, usually on moral grounds
If a company, having a near-monopoly in the realm of digital distribution, is not suppressing something by disallowing it to be present on their service for reasons other than quality, then I dunno what it'd have to do.
Censorship does not have to be law-enforced, even if that is the most common association. It can be societal, such as in the form of a taboo, where those breaking the rules of what's considered proper to speak of are ostracized by society (which is something already happening here due to this touching upon the subject of murder for no good reason). And when someone bleeps out vulgar language in their youtube video, is that not (self-)censorship as well? It's not crossing the law, nor even the guidelines of youtube, it's just someone's personal view of what's morally acceptable.
Just because governments are the most effective at enforcing their moral standards through laws doesn't mean there aren't other, less efficient methods at work.
Also, you usually can't prevent something from being
created through censorship. A censor acts on what's already been created, usually the final product, else they'd be psychic police.