Soapbox lead developer, Alex Gleason discovered, that at least 5 Fediverse instances are blocked by Threads. These are:
- One of most-blocked instances on the Fediverse (for good reasons), poa.st,
- An infamous TERF instances, spinster.xyz,
- Its offshoot, neenster.org
- A bridge between ActivityPub and Nostr protocols, mostr.pub,
- And a Fediverse instance with cryptocurrency integration: https://mitra.social
All five instances were not able to fetch posts from Meta’s instance, which made Gleason suppose, that ə is using AUTHORIZED_FETCH.
Contrary to admins, who signed FediPact, Gleason is keen on federating with Instagram Threads and made a patch to circumvent signed fetch by using separate domains for request signing.
If you are an admin of an instance, watch out for these spoof domains
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