1. No
2. No
3. do not use you won't get profit
End of the story....
Sadly it kind of looks like that.....
I'm wondering if they will be so restrictive with the D3 ( if they bring it to hashnest ) since they don't have a X11 pool....
My guess is that Bitmain won't host miner in the Hashnest that are pointed to other pool than Antpool.
They most likely will come up with a Dash pool in the future.