I just realized, rereading this now that I think I misunderstood the intent of the tread.
I mean, my earlier post asked about if sins unseen still damn, which I actually think I am wrong on, because I twisted the question in my head. The Nonmen dug deep for reasons, one of which was to avoid the sight of the gods. So, indeed, it seems logical that sins committed out of sight are unknown. But that wasn't the question.
I think the question was, does being out of sight keep you from being damned? And to this, I think the answer is actually still no. It's why it is important that the No-God stops the cycle of souls, but doesn't actually "blind" the gods. Sin marks you. Once marked, you stay that way, until absolved somehow or you die. What the No-God does isn't absolution though, it's annihilation.