Wow can't believe this happened, just came for my random drive by and see the tracker is gone Want to say thank you to Haku for running this as long as he has, I'll always remember my time here.
I'm the former admin from AKBonline, it first started off as just a Wordpress blog I used to distribute my weekly encodes for people that wanted a direct download option. It eventually became too bandwidth hungry so I had to resort to bittorrent. I ended up using the same tracker service (xbtit) that is being planned by amorphous_mass. It's also the same one Avistaz uses. I'm not sure how it's been upgraded over the years, but I found it very limiting. Simple things like Bonus Points were "premium hacks" I had to pay for as well as other things just to make the tracker more friendly. Maybe being minimal is a good thing though.
Anyways I think overall JPS is the best, they use Gazelle which was more designed for music but because of that it's so much easier to categorize and search for things. Nyaa is public but good luck getting things to last there, the most recent torrent uploaded in the idol category has 5 seeds with 77 downloads completed. I have some JPS invites if anyone needs one, but I need proof of ratios on other sites for my own protection so PM me if you want one. Sorry