Originally Posted by AsiaTraveler
(Of course, if your airline of choice does offer one-way flights at half the cost of round-trip this is really a moot point...but most don't seem to.)
Not necessarily moot point. You may want to lock in flight that is only offered seasonally (flights may be unable to be booked later), ahead of possible FFP devaluation, or if award availability is tough to find, amongst other reasons.