&#62; <i>But they are difficult to get in to.</i><p>Not really. I joined one just to see what it was like. All I had to do was show up in an IRC channel and go through some 'testing process.' Apparently if I was referred by someone I could have forgone that process. My 'membership' recently lapsed because I never used it, but it wasn't hard to get in.<p>They did have some onerous rules though. Like getting kicked out if someone you referred breaks a rule. I think you even got kicked out if someone referred by a person that you referred got kicked out.<p>&#62; <i>They have very strict sharing requirements (you have to contribute not just leech).</i><p>The problem being that there are <i>many</i> torrents with <i>only seeders</i> connected to them. So it would be hard to keep your 'quota' without a concerted effort. It's not just 'leave your torrent client open when the downloading finishes.'