Monetisation. Facebook has a commercial imperative to distribute content regardless of what that content espouses. None of the other companies have any commerc

Monetisation. Facebook has a commercial imperative to distribute content regardless of what that content espouses. None of the other companies have any commercial imperative to generate income from you after you purchase access to their services/devices. Sure, they could play a role in preventing crime (and often do, e.g. the way printers print identifiable patterns on printouts to track printer usage). But in the chain you describe, Facebook has a direct financial reward for distributing such content (via displaying ads) and no other means of generating income.