Seems like it's admitting that they both don't know how to stop people technically and don't know who any of the 100 people are.
(I'm from Europe, asking out of curiosity.)
It's not enough to be used as evidence in court.
Most likely did the majority of the bots use proxies and VPNs, which may or may not provide additional information about their customers, but even then it has to be proven that is was the same user that did the acts which is very difficult.