In recent days, stackexchange has been hit by a series of DDoS attacks , leading to the blocking of Tor exit nodes.
I'm curious how a DDoS attack would be more effective when routed over Tor. From what I understand, it would only lower your output due to needing to route over the network, and then you are constricted to however many exit nodes there are (2000-3000 last time I checked). The bots would also have to compete for traffic with the other 2 million Tor users, further reducing throughput.
To me it seems like it would be making your attack less effective, with only the benefit of not exposing the botnet IP addresses.
Is there something I'm missing here? Unless the attack relies on something other than sheer amount of traffic, I don't see how it would be more effective.