@mcc Right now there are people hosted on Blacksky who cannot post because they are banned by Bluesky.
I've been asking Rudy about how independent Blacksky is from Bluesky but have not heard back yet.
From what someone said, it seems that Blacksky is using the Bluesky labeling system which performs moderation. Thus, to be banned on Bluesky means you are locked out on any instance that uses its labeling.
Some more context https://bsky.app/profile/bloomfilters.bsky.social/post/3m2ih4oh64r2v