Suprnova pool has a major big farm mining with an incredible hashrate, and two more "small" farms... so incredible that does not take to long to have 51% hashrate, in theory...
My guess finger is saying to me that new ASICS from Bitmain are beeing tested on Zencash right now...
This is infamous.... 16.720.549 Sol/s - half of Suprnova hashes... equivalent to about 2000 units of Z9 mini Bitmain ASICS.
https://ibb.co/hPfTv8If we not get ride of this guys ZEN will be severely hurt...