I bought the domain so it's me.

I created my version for exactly the same reason. I simply wanted to use my own platform. Perhaps a little more reliable and with the latest changes.

Are the servers too busy?

Exactly! I had received feedback from other users that the site was no longer accessible or was reporting errors. I realised that I was receiving up to 1 million unique visitors and several million requests per day at times. The pattern of the requests made it clear that they could not be coming from human users. Many of the requests came from Singapore and Latin America. You probably followed this on the witness channel. To stop the requests initially, I had to block certain countries. Unfortunately, this also affects 'normal' users.

Currently, I have about 300K users and have received around 9 million requests in the last 24 hours. My server can handle this. Even though I know that most of the traffic is generated by bots, there is currently no need for action. But I have to keep an eye on it.
I suspect that your site will also receive such requests soon if it is accessible for a while and becomes better known...