The Archive has been censoring things for a while, and requires an account/login to download certain things.
They were hit by a DDoS attack before this too.
I understand their importance. There is so much stuff I've pulled from IA into my own archives, but they're also trying to invent new copyright law and piss off everyone.
I don't want them to go away, but I'm also sick of their shit and this isn't really surprising.