Originally Posted by
sdm1130
Any idea where? I would be very surprised to see this happen. Think of the possibilities on CO mistake fares.

It is alluded to
here
I believe that the second seat was to collect points in a second account, not on the "master" account, so that the passenger could redeem for a second seat on a reward trip, not so they can take advantage of fare mistakes (or just a trip that they are taking anyways. But I might be wrong on that aspect.