It does, qbittorrent support is still "experimental" though. i2psnark and biglybt will outperform it.
If you can run i2p on your seedbox could do it. Simple enough on a plain vps. If i remember correctly though i thought the web interface doesn't (or didn't) support i2p stuff, only gui. Haven't used qbittorrent in a while.
I'm aware mostly of where to find this info from within i2p:
I2p wiki- filesharing
http://wiki.i2p-projekt.i2p/wiki/index.php/Filesharing_and_I2P
Filesharing forum
Guides:
How to correctly download torrents from Clearnet using I2PSnark.pdf
http://tracker2.postman.i2p/index.php?view=TorrentDetail&id=66113
[TUTORIAL] How to correctly cross seed to make Clearnet torrents available for I2P Network in Postman tracker.pdf
http://tracker2.postman.i2p/index.php?view=TorrentDetail&id=65809
[TUTORIAL] How to use I2P in qBittorrent
http://tracker2.postman.i2p/index.php?view=TorrentDetail&id=72171
Correct BiglyBT settings for Ultra Fast I2P torrenting.pdf
http://tracker2.postman.i2p/index.php?view=TorrentDetail&id=66500
there's irc in i2p, irc isn't everyone's favorite way to do messaging...but it's a good way to get answer to questions from people that know more than i do. i2p folks have a good amount of distrust for the clearnet so some of them stay away from it.