The multipool https://prohashing.com/ is offline and has been since Saturday 17 June. On Friday they claimed to be under DDOS attack. And said they were going to pay out all the fees they made for the day to the miners. On Saturday they put up a post about the sites current down time on the forums. Here which is now also down or gone. Also there are no updates after Saturday on their Twitter
With the lack of updates and no word from the pool owners in 48 hours I can only speculate that during the ddos they were hacked and lost all coins. But it for sure looks like yet another case of a mining site shutting down with out warning and with no word as to why.
I hope I am wrong but until we hear something we can only assume the worst.
Thanks for reading!!