A better idea might be say
0.1 - 0.15 : maximum 1 download, no limit on filesize, but you can only download 50mb of that file (in other words, until you get over 0.15 ratio, you're stuck with only 50mb of the large file you started downloading.) This means people when they first start out will look for torrents that are in high demand to get over that hump asap - that's starts them out with the right habits, and it's good for everyone at gt.ru
That sounds pretty good. The problem is you have to find a file that someone else wants or you could be stuck.
If you are into some of the lesser used torrent sections, then it can be hard to find leechers to share to. Twinks, Youngbloods and hunks will always have someone to leech to, but some of the others may not.