That post isn't very clear about what specifically happened on BlueSky that made the author move, and I can't see the full thread he links without having a BlackSky account.
What moderation decisions were made regarding this "Link" user that were suspect, using the post author's word?
My perspective of that situation is Link was a fairly popular poster, and had a post that was a quote post of someone from the Bluesky team with an image of an assassinated figure and an alt text that couldve been perceived as a threat to the bluesky team.
Some commentary ( https://bsky.app/profile/mackuba.eu/post/3m2jtzlznu22o ).
IIRC it came during a week of discourse & tensions around bluesky moderation concerning some controversial writers ( https://bsky.app/profile/jay.bsky.team/post/3m25esnq4t22y )
I share this just to be helpful a tiny bit but theres likely a lot of context missing and different perspectives on this.
There are a lot of misunderstandings about what Blacksky is assuming that it's a just a community fork of Bluesky.
The Blacksky team has a much broader vision for which they decided ATProto was the right architecture.
There's a lot more to read about them up on their site: https://blackskyweb.xyz/