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It seems my first and only reddit account created two hours ago is shadow-banned since the very beginning, tried one comment on /r/cpp and one post on /r/rust, nobody ever seen them other than one kind mod that confirmed there's nothing they can do.
Even funnier is that there is a subreddit /r/ShadowBan dedicated to test shadowban and some obvious spam-bot accounts are not banned yet mine is.
related: [1] https://news.ycombinator.com/item?id=30344907 [2] https://old.reddit.com/r/modhelp/comments/oonfba/
EDIT: now this post got flagged as well, the funny continues.