The reson for us bringing this to light is cause all the lies told by their pool-ops.
Another reson is also that they've deliberately avoided all of our detection mechanisms to avoid large-scale miners like these (botnets primarily, but also pool-hopping pools).
The third reason is that they ARE having a bad effect on our system, as it's 500-600GH that jumps to us for a few minutes, and then it's gone again. Such spikes are VERY hard to handle for anyone (it's thousands and thousands of simultaneous requests)...
We are aware of that we're still a prop-pool, but that wasn't the reson for us decicing to ban them, it was purely for the better good of the community, site and bitcoin as a currency.
And yes, we are switching from prop to PPLNS, check our previous voting-thread for more info why ETA is in a few days.
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Regards, Jim
Bit LC Inc.