It is utilizes Tor hidden services which have been broken by the NSA. Tor and I2P are not reliable anonymity. Do not rely on them. As well, they are probably honeypots so using them brings you to the attention of the NSA.
Someone please post a link to this post over in the Monero thread so they can come over here to address it. I don't want to shit on their thread. I am not criticizing Monero per se. I am technically criticizing I2P when deployed against a high-powered adversary such as the NSA. I am disappointed in whom ever made this decision for marketing reasons (apparently) without sufficient engineering investigation.
I2P (which is relied on by Monero to insure your anonymity) has updated
their detailed summary of potential attacks. That looks really bad (as I had expected). I wouldn't trust for that for obfuscating who sent a message to whom in the face of a powerful adversary and neither do they...
I am thinking about fixing this and helping Monero (and Bitcoin and every cryptocurrency) before I continue work on another coin. So that will demonstrate I am not attacking Monero and I am not selfish. It would also demonstrate my (or my small dev group's) coding skills to everyone. But that is not yet a promise. I am exploring this option now.
Note this past week nearly no symptoms from the Multiple Sclerosis (other than fatigue that results from working 100+ hours per week). So the strict Paleo diet I am on appears to be helping.