What is there left to discuss? This miner was using an exploit where MPH had a bug that counted diff X shares like they were diff Y shares, Y >> X. As the extra "hashrate" this miner provided always was just bs, MPHs "luck" was affected accordingly. As long as there was a decent mix of users using this miner and the rest using an honest miner, you could prey on the honest ones and make a tad more above your expected return. As more miners stated using this miner though, MPH finally grew tired of the "bad luck" and fixed the issue a few days ago.
That this wasn't obvious to everyone using this miner is beyond me. Supporting one single pool, and for some reason that pool just seemed to in a constant bad luck mode? Jeez...
This zFastScam miner game is over.