I wonder why I2P is getting so small amount of love. I've read somewhere that for some reason it's popular only in Russia. It has two working email systems, working Bittorrent and much more. Maybe it lacks a native (C or C++) implementation?
Try installing it, search for files and watch download speeds. Onion routing and tunnels cost bandwidth. The crowd that is used to Bittorrent speeds (in combo with VPN safety) is not interested in 2 Kbit/sec speeds. Plus the user interface is hard to understand without having attended crypto courses.
My understanding of tribler is that it is going to use onion style routing and use some internal cryptocurrency to incentivize users to provide bandwidth. They hope that with proper incentives people will provide enough bandwidth to enable speeds that are high enough to stream high def video anonymously. They hope to prevent spam by enabling anonymous wiki editing of torrent channels and voting of torrent quality.
Sure, but that's still the reason it isn't as widely used. And because research resources in the anonymous-networking field are so limited the marginalization of I2P tends to be self-reinforcing.
