In their defense, in three minutes most people cannot make any money (short of looking for coins on the ground perhaps), but that is enough time to add to your skills somewhat if you have a certain kind of job - I am not certain exactly how you would correlate a small increase in present knowledge to future income but if you free up time every day and actually use it to study something that increases your value in whatever career you chose your long term prospects should improve. Some people actually do walk around with the latest OpenGL specification or whatever else they wish to study just in case a few minutes open up.