It does make sense if you have a guilty conscious and think you just got caught. Giving it back eliminates the financial gain. Now there’s much less of a crime

It does make sense if you have a guilty conscious and think you just got caught. Giving it back eliminates the financial gain. Now there’s much less of a crime since there was no profit. There’s also motivation to give someone money if you were honest, like trying to make them happy or go away, but it’s an expensive way to accomplish that and probably less common.