http://xa63tpfoaqt3zru2ehxjjfbpadwj4ha6qsdvtcqtyr3b7hmt4iaq.b32.i2p/faq.html
By operating on the content layer, Syndie does not depend upon the
performance or reliability of distributed networks like I2P, Tor, or
Freenet, though it can exploit them where appropriate. By doing so, it can operate fully with small, ad-hoc mechanisms for
content distribution - mechanisms which may not be worth the effort
for powerful adversaries to counteract (since the 'payoff' of busting
just a few dozen people will likely exceed the cost of mounting the
attacks)...