You mentioned ComicBT so I think that is the tracker you are talking about, but I'm not 100% sure due to the way you worded it. Assuming you are, their system is actually better for you because it has nothing to do with how much you seed, just how long. Sure, it means you need to let the stuff sit there for awhile (not sure what the time is to earn back 1:1, and I see conflicting numbers on the forums vs. the FAQ), but it doesn't matter if you have seedbox speeds or dial-up, it just matters that you are connectable for X amount of time. It does mean that starting off can be a bit slow though, and there is no way to dive right in and earn massive upload credit if you do happen to have great speeds.
I managed to get in before they changed the system, and right before a site-wide freeleech, so I have a fuckload of carats. If there is a way to transfer them to another user, I'd be happy to send you some. I can't see a way to do it though, outside of making a specific torrent freeleech just for you, which seems kinda dumb.
EDIT: Oh yeah, and look for diamond torrents, which are freeleech and will do nothing but earn you positive carats for as long as you seed them.