They were the ones withholding on Slush.
They obviously were testing their mining proxy/system live mining on Slush and it was fuxored, withholding blocks.
Testing code on a live pool means you are asking every other miner on the pool to risk losing BTC with your testing, rather than risk it all yourself.
Scum bags.
They should have solo mined to test their code until they found some blocks and thus knew it could at least do that.
I'd not go near them.
Though ... I guess I should try find out where they mine from and block them ... ... ...
Were they withholding just lately? This could explain Slush's luck numbers lately... I understand variance and high/low cycles being normal.. but these numbers have just been terrible:
https://s31.postimg.org/4u1t46t57/Slush.jpgThat being said, I just switched over some more hash to Kano today.