And they can only connect to Threads because Meta doesn’t want to go after thousands of private single-user instances, clutter their blocklist with them and check every once in a while if they still exist to keep it from being clutterted too much.
Also, at least on Hubzilla and (streams), it’s the single-user instances that are likely to have an actually public pubstream. But not necessarily the federated one that Threads wants.
And they can only connect to Threads because Meta doesn’t want to go after thousands of private single-user instances, clutter their blocklist with them and check every once in a while if they still exist to keep it from being clutterted too much.
Also, at least on Hubzilla and (streams), it’s the single-user instances that are likely to have an actually public pubstream. But not necessarily the federated one that Threads wants.