Question. If a player accepts some the gifts in the temple, does the flaw remain after the gift is used up.
From the adventure (specifically the Amber Sarcophagi sidebar):
The instant a dark gift is received, the creature receiving it undergoes a transformation, gaining a sinister physical trait or flaw, or one of each. Unless the text states otherwise, a trait or flaw that accompanies the gift can’t be removed by anything short of a wish spell or divine intervention.
So yes, the flaw remains until removed by a wish spell or a god. (Neither gift specifies any other condition that removes the associated flaw.)
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Pauper