Territories with national firewalls (or heavily concentrated ISPs who represent a tractable number of chokeable throats) can block noncompliant servers from their users (who might or might not avail themselves of VPNs to evade thse blocks).
There aren't many national firewalls, and enumerating all the noncompliant servers in the Fediverse is a big chore for their operators (less so for all the noncompliant Atmostphere servers, because there's just not that many of those-yet).
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