The fact that in one case the advance redounds to private advantage and in the other, theoretically, to the public good, does not alter the core assumptions common to both.
have an effect for good or ill; "Her efforts will redound to the general good" be added; "Everything he does redounds to himself" be deflected; "His actions redound on his parents" be excessive in quantity
If an action or situation redounds to your benefit or advantage, it gives people a good impression of you or brings you something that can improve your situation. The success in the Middle East redounds to his benefit. redound to sb's credit/honour etc to improve people's opinion of someone (redonder , from redundare, from unda )