“To learn who rules over you, simply find out who you are not allowed to criticize.” A neo-nazi saying that is falsely attributed to Voltaire to try and legitimize it.
Short answer? The service is still incredibly small and posts aren't usually flooding in second-by-second like you may be used to on the much bigger sites, so one over-agressive user can easily dominate the front page for a while, purposefully or not. That's just going to happen.
If you'd rather not block the whole community, hide the individual posts as you spot them to free up your feed again. If one user keeps dominating your feed, just block them. That's the best we can do as regular users.
It was a stunt. Incoming administration has been saying all week they were gonna "save" it. They pulled the plug temporarily as an FU to Biden and support for the incoming fascist that they know they can control better (with stunts just like this).
It's interesting how the past few months have made it super easy to tell who is an indefensible piece of shit. Lots of previously unassuming-to-"cool" personalities suddenly going whole-hog for fascism in the US.
Good luck with that.