I'm not sure a 5x+ growth in under a week is really "for a while now". If anything I'm surprised they've kept it together this long. The growth looks more like an exponential function too, so that's even more difficult.
> We have been adding new servers and extra capacity at a record pace every single day this week nonstop, but today exceeded even our most optimistic projections. Millions upon millions of new users are sending a message that privacy matters. We appreciate your patience.
Good luck Signal team!