1) a bahillion new signups, so they just needed to deploy a bajillion more instances of the server.
2) The clients basically DDoS'ing their servers.
If you look at the android client source, you can see all the commits they put in are about handling errors properly when the server(s) get overloaded.
Not that I speak for the project but this isn’t privileged information anyways: If you have TestFlight, you will see there have been several updates pushed to TestFlight over the last few days.
1) a bahillion new signups, so they just needed to deploy a bajillion more instances of the server.
2) The clients basically DDoS'ing their servers.
If you look at the android client source, you can see all the commits they put in are about handling errors properly when the server(s) get overloaded.