Non-essential crypto news covers crypto advertisement, insignificant news that does not affect legit users like XMR/ETH/BTC holders or darknet users, posts relating to garbage like Brave browser and its coin, and so on. Due to the multiple kinds of crypto posts that pop up, this rule will be applied subjectively on a case-by-case basis.
Community complaints about Elon Musk were raised here. https://lemmy.ml/post/7186058
A lot of ad and spam posts appear regularly, which need to be squashed. This will be enforced more heavily from now on.
Sometimes legitimate products are advertised, which should be allowed to post. This will be checked per case basis, and unless asked for permission, all such posts will be removed without notice.
You shared this link to claim Brave is a good privacy browser, which it is not, and you are now using a strawman to justify your plainly wrong argument.
Their privacy policy changes or harmful actions towards privacy becoming a news will get shared, but there is too much bad that comes out of Brave, and nothing good that makes it better than other Chromium based web browsers. This is why it does not deserve being shared around in positive light. Those are the rules, since enough Brave/crypto shills roam around in tech communities.