It's just someone using a diff multiplier trick. Shares are valid and accepted on hashharder (because there is no validation) so he get 99% of each block, but i'm pretty sure he didn't find any himself.
Hashharder has to ban his IP or to patch his stratum, as he did for fresh
That's total and complete rubbish.
I nearly cost one poor person almost 2k fresh because of this rumour. The person had amassed quite a lot of CPU computing power and was being penalised because of the perceived "fake hash" of it.
The shares that they submit are valid. The big hashers find a lot of the blocks - as would be expected.
There is not a working exploit for difficulty currently present in the stratum-mining implementation, unless someone can prove this to be the case. The
only one that had this "bug" was a long time ago, and essentially due to the incorrect way in which the diff1 setting was masked.
Its a cpu coinThis means that botnets, or computing farms can bash the hell out of it.
It happened with monero and boolberry and nearly all other cpu coins. Amazon compute clouds, Google compute, Azure, and infact any CPU based infrastructure.