Mmh, I don't want to take part for anyone, as I don't care much, but my question is, when you have only 3 rare songs, or rare things or whatever, how can you trade ?! Hey, I mean, there's a beginning to everything, as for anime of movies sharing with a 1/4 ratio. Ok the theory is good, but when you don't even have the 1 from 1/4, do you wait for it to fall from the sky ?
I don't know much about bootleg or trading and everything, but IMO those kind of things (band videos, lives, etc etc) should be shared freely. In any case, I won't ever bore myself trying to find some kind of rare stuff (that BTW I really wonder where I could find that before someone else got it) to get another rare thing.
But I won't re-invent the system ^^