@mngrif I was kind of surprised by this, but visited and can confirm -- their About-More page has their blocking list and it's pretty extensive.
They list Qoto, and the justification seems to be the same as mastodon.technology -- for federating with instances they disapprove of.
Looks like it might not be due to this latest complaints thread about the subscribing to public posts discussed in other thread yesterday.
The irony of this whole fiasco is if we had forked from any software other than mastodon it would have been a non issue. Protected accounts are uniquely mastodon and not parto f the ActivityPub standard. That means on other servers (like misskey) the feature I added is the default. So no one would have batted an eye.