i think a better solution would be after a point in time as stated above 6 months i would most likely go lower
based on file size, how many seeders, how many leeches,  and age, and time of seeding
that the seed bonus either increase or decrease
so if theres only 1 or 2 seeds and no leechers  instead of the .5 a hour for all torrents it should be per torrent for the ones that this will effect
so if you been seeding by your self or a few others based on those bonus goes up or down

doing this should increase the amount of people that either seed it longer and the amount of seeds should be better then 1 which takes 16 weeks to download from
its not fair to only get .5 seed to seed torrents that are 3 months + and not getting any incentive in doing so
maybe a a extra bonus if you speed is faster then set amount  its crazy to download things at .4K - .10K

also per seed credit and not overall .5 seed per a hour total for any amount of seeds
maybe .5 for every seed
perhaps to a max allowed seeds but rather better with out a max.

i dont know if i expressed this well but i hope the idea of it is understood