Hive accounts can have all the rewards removed though, with relentless downvoting, and if an account rep goes below zero the posts no longer properly display. Years have gone by but still nobody left on Hive seems to want to admit the content here is being controlled and censored just as it is on other platforms.
It's entirely up to the front ends to decide what they do with downvoted content or content created by low-reputation users. Ecency tends to show everything. And yes, rewards can be taken away, but hardly anyone receives any rewards on Web 2.0 platforms in the first place.