Dmitry has stated that btc-e is very much against premine, when asked why no new coins are being added he stated: "all new coins with premine "

Somebody who speaks russian may be able to convince him about monero. I speculate that btc-e may also prefer to own a seisable stash of whatever currency they add. That may be more of a difficult feat. I have some vague memory of something like FTC devs paying a huge chunk of coins to get it added, but in another case btc-e ended up doing a proof of burn after accusations of recieving coins (maybe that was TRC or nova?). Don't quote me on that, maybe somebody else remembers better.