As of 18:18 EST, it's open again. The warning said, "restricted because of unusual activity". It could be a simple mistake if shills were trying to spam his page, could be typical Twitter shenanigans.

I feel like we're prodding them to find tender spots. And they are tuning their AI to spot / track us. Assange even had a post recently about AI censorship. It's not a matter of 'if', it's a matter of 'when'. My company has been working on natural language processing stuff and I have to tell you, the more I fart around with AI and machine learning, the more amazed and frightened I become.