From what I've heard a good chunk of people rotate their seeds for LibGen because their seedboxes can't handle all the connections for every torrent at once.
I'm sure someone could get you the info to get setup as a seeder. For modern clients it's rather rather trivial to manage that many torrents. Get any decent modern CPU, 4gb+ ram, and $560 in storage and you're off.
I think the problem is that because of the size of each torrent, and there's 1000 of them, it's difficult to effectively seed all at once, so instead people would rather seed sections at once, and rotate through them.
I'm not sure how people setup the rotation though, that can't be an incredibly common feature but I could be wrong.
There are features that prioritize those with low seed/leech ratio in a sort of periodic fashion. Also it partially auto-balances because a swarm only needs a little more than unity ratio injected into it to get itself fully replicated. So each one that get's chosen because of a low seed/leech ratio will inherently drop out of that criteria as soon as the swarm is self-sufficient.
