At which point did I say centralisation?
You're using the term scaling in an entirely inappropriate way.
How many of those billion messages are unique? How many get to be viewed or themselves cause further messages. Just spouting numbers out of context makes no sense.
Scale always matters and it makes no difference whether it's what you call centralised, single ownership, or multiple individual ownership.
@simon_lucy Bullshit. I'm using scaling in the context of "How does 1 billion messages get sent."
And it's 100% true that the Fediverse is capable of sending 1 billion messages per month, as we've already just seen.