I’m curious about how they handle retracting the quote in an open source federated model where the behaviour of other instances can’t be ensured. Does the instance hosting the quote simply refuse to honour the quote link?

And I suppose if an instance uses a hostile workaround like simply embedding a copy, that would be seen as a bad mark against the instance which could lead to defederation?

I’m not saying it’s impossible, just interested in the specifics.