That doesn't make sense though, as all the DDOS people have to do is aim their bot army at the new site. Probably just a single parameter in their attack scripts. I mean I'm an idiot and I can launch a DDoS on someone, I just don't have the $$ or compromised army of iot devices to aim at accomplishing that, nor really the will to do others harm. Whether you're in Europe or NA doesn't matter.
If their plan is to get online via the second location, it's likely that said location has a much beefier upstream or built-in filtering, allowing them to absorb these amounts of traffic without being null-routed.
More likely, though, they're restoring the service to a fresh IP range and put the servers behind some kind of DDOS-protection or, alternatively, they simply choose to do the switch now as they need to do a full restore anyway and it's not related to the DDOS mitigation.
