Here is the whole official announce:
Hi all - Due to the falling bitcoin price this week, ANTS2 and UMISOO contracts currently have higher maintenance fees than they do revenues.
From April 14th, 2015 (Beijing time, GMT+8), Hashnest will calculate once daily ANTS2 and UMISOO expected revenues on a PPS basis. This calculation will be performed between 12:00 and 13:00 Beijing time each day. If this calculation returns a negative result, the losses will not be deducted from your remaining balance.
If negative income conditions persist for ten days in a row, ANTS2 and UMISOO contracts will be terminated.
Currently, theoretical PPS return per terahash should be 0.01017BTC, and the daily electricity cost per terahash of ANTS2 and UMISOO is $2.304 USD. As long as BTC price is lower than $226.54 (2.304/0.01017), the electricity fee will exceed the mining rewards.
The bitcoin price used will be the CoinDesk BPI USD price.
When we wrote $226.54, we used it to calculate the situation "ANTS2 and UMISOO contracts will be terminated". BTC price used to calculate will change along with difficulty increasing.
Hashnest will pay you by PPS mode instead of frequently changing between PPS and PPLNS mode due to the
fluctuant BTC price.
It is the best way to reduce user's loss under current conditons.
Just so everyone is on the same page. Today we had a positive payout so the 10 days will restart if we have another negative payout. Can you please confirm?