Someone has apparently written open-source software to circumvent fediblocks by "woke" instance admins (I kid you not -- they're unironically using that term).
The only domain we currently know of providing this service is activitypub-proxy.cf, but I'd expect more to pop up.
We may need a tool to periodically scan federated domains for heavy subdomain usage that could be this software in use.
Anyway, thought everyone should know.
-- your woke administrator (well... partly woke... I haven't had my morning caffeine yet)