As LTC was just added to huobi while cex.io just got a pure LTC mining pool after a week of 1.25x and 2x bonus awards as well,
All those three links are referral links, btw, so if you sign up, I get some trading bonuses from the services. (does not cost you). You can then refer users for personal bonus.
I worked out that selling my khash at scrypt.cc gave me BTC 0.64 and then I exchanged LTC 22.3 at cryptsy and then sent that to markets.cx deposits. I went from 440 khash on scrypt.cc to 1012 khash on markets.cx :) That is rather sweet.