> "It's not so much "valuable social network mapping" as it is "the only social network available to Signal", by design." I don't understand why you state this

> "It's not so much "valuable social network mapping" as it is "the only social network available to Signal", by design." I don't understand why you state this, when you obvioulsy know that data is connectable and joinable across discrete sources. Being "the only social network available to service X" is the inherent case for every single online service on the entire planet when viewed as an isolated entity. But this isn't a case of anonymized UUIDs. It's a case of personal phone numbers.