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I read an example on the net once that might clarify the "no immediate advantage" thing.

The guy was talking about working at a rail yard. At the end of the day, train cars were driven back into the yard for maintenance and/or storage. Interns were not allowed to do that, since it benefited the company. So the cars had to be moved back into the yard, then one or two were taking back out so interns could drive them back.

Kind of odd, I know.