I'm mining over at coinmine.pl and there is only 300Gh/s of miners right now..just a couple weeks ago it was in the thousands! More for me to mine 
The reason for that is, because moste of the Coins are allready mined, and block reward is now 3.9 Coins, a few weeks ago reward was much higher, so nobody will mine this coin anymore... you also can mine zetacoins easy solo if you have 30+ GH/s.