I don't believe the claim of their publishing rate is accurate. They published over 300 papers last year according to the research website (https://research.fb.com/publications/?dateYear=2019).
Is a small university department really producing more than a paper per working day?
Does a company like Facebook really develop new tech, or just apply it? They don't produce that many papers, compared to even a small university department.
How are you even measuring the volume of new tech? What is one new composite material compared to one new JavaScript framework? How do you compare those?