twitter sucks, and might ban pornographic content at some point in the future too. Also, twitter downscales anything uploaded to them, so you'll have to upload to a third party site (like for tumblr). The only way to be immune to censorship is to go decentralized and federated. You could set up an account on an instance of Pleroma or GNU Social, which are part of the ActivityPub Fediverse. Or Diaspora, Friendica, etc.