... Do we still send them the boards (they technically are under-performing still) or do we bite the bullet and hash at ~485GHs with this one? ...
I say lets keep those boards for 2 weeks and see if difficulty stabilises a bit (or at least slows down in rising). If it will be stable we could think about sending it back. If it will keep growing exponentially "burn them to the ground" ;-).
I have wired them some money from Poland in PLN about a week ago and they still do not show up in my account. I am not sure if it is a sinking ship but for sure it takes longer than should.