Dread (the REEEEEdit clone for the Tor network) was being DDoS'd for a while, and now it's back with a literally impossible to solve Captcha.
You have only 1 minute to solve, and even if you solve it in 3 seconds, you'll still get an error saying that it took too long to solve, because it'll always take more than 5 minutes to send and receive requests, because the Tor network is so slow.

So I guess they just killed the entire soyte just to prevent a DDoS attack...