I just started mining this on the official US pool and I see it implements the terminally broken vardiff system so common to Cryptonote pools.
I'm doing about 720 H/s on the 5555 port and diff is already at 129922 after a mere 10 minutes. I understand that higher difficulty shares are worth more, but that is only true if they get solved/submitted in a timely fashion.
Usually one specifies a fixed diff on similar pools by inserting either a "+" or a "." in between and . I read the first page and the last 3 pages of post but didn't see this mentioned for ird.cashpool.us (I did see that a pool in France offers fixed diff, but ping time isn't too good for me here in the US).
Hello, there is no "official" pool

each belong to their dev. Maybe ird.cashpool.us did not allow it. I just implement it on
https://irdpool.frEDIT : Pedant ? I'm just trying to help. Next time I will just answer : "No pool support here : ask directly to the owner"
I gave you some sass in my edit because you took the time to correct my description of ird.cashpool.us but didn't take the time to read the part which I bolded above for extra emphasis.
As for why I asked about it here rather than email the pool owner directly, I thought an answer to my question would be of interest to others. I know many feel the same way I do about the totally dysfunctional vardiff strategy usually implemented on Cryptonote pools and it is only by complaining about it loudly and often that anything will ever get done - after all, there was a reason you implemented fixed diff, no?