I am certain they've got the numbers covered, however the on-going issue of latency issues with dedicated server games, seems to remain as problem as input is rather delayed but i doubt that has anything to do with the overall amount of players. Regardless, servers seems to be holding up quite well on both PC and Xbox flight (i have been testing both) and matches come fairly quickly, so i suspect there is plenty of players.
That's not actually how online really works, and numbers are not covered until they are actually covered. The best devs can actually do is make a system to uphold it, however half or even more than half the time, it over exceeds their predictions.
I'm actually fairly quite concerned now because we are talking about the same development team that worked on the networking on MCC and left it in such a poor broken state for so many years until later fixing it.
This honestly should be a open beta for everyone, not sure why or how this is actually helping them in any way to be honest. At first I thought this was pertaining to secrecy(secrets), but the fact many people are uploading videos and talking about the game full blown great detail, I don't see the point at all anymore, and if anything would help stress test the game for the amount of people playing.
Not to mention the amount of people having so many different specs and hardware for their PC's..
I'm feeling like this may be another MCC launch again, and I'd hate for that to happen.