The bottom line seems to be that while controversial, this "harvest" of sea turtle eggs is perfectly legal. The claim is that the first sets of eggs laid on the beach are destroyed by subsequent mother turtles laying their own eggs. So the reasoning is that since the first eggs are basically not viable, why not let the locals digs them up for profit?
It seems to me that since these turtle are a vulnerable population, it would make more sense to gather these "hopeless" eggs and then attempt to hatch them. But governments are not known for having common sense. Go figure.