How does that work? Is threads using a protocol compatible to lemmy? (And I fully agree with the preemptive blocking of any facebook stuff).

Edit: thanks for all the detailled answers.

So Facebook tries the old EEE - Embrace Extend Extinguish. 1.A big company is Embracing an open source standard ("we're friendly, see?) They get a lot of users that way - even the open source savvy types. 2.they start Extending that standard "to make it even better" - but not talking about these changes with the rest of the community first. They cannot react quickly enough and become incompatible with the new version of this standard. 3.Extinguish. When all the users are effectively using the big companies platform with something that isn't the original standard anymore they change it so much that it isn't compatible at all anymore or replace it completely.