The fundamental problem is that Reddit's workings are gnostic by design. "Shadowban" is a horrible concept from the get-go - "my anti-spam measures will be so much more effective if the spammers don't know they're in place." Essentially, Reddit's countermeasures are so shitty that if people knew what they were they'd be useless. Know my most effective fascist automoderator tweak? Require all posts to come from someone with two comment karma or better. Which takes essentially zero effort for anyone actually on Reddit, but is literally impossible from within Hootsuite. Looks like we're oppressing new users, when in fact we're cutting out 50 spam posts an hour.
Not so. Comment karma is not link karma. A user with zero comment karma or link karma can comment freely when the rule is about posts. Besides which, all one needs to do is message the mods and say "I can't see my post" and you get let through. I do this about 12 times a day.