Worked for a large, national US cinema chain not long ago. Was tasked with automating the on/off of the projection bulbs for the entire circuit based on individual auditorium ticket sales. Collaborated with one other guy to turn off the bulb in an auditorium if ticket sales were zero 15 minutes into the show and strike the bulb if a ticket was sold during the show. This small piece of software saved the company electricity and bulb replacement costs in the millions $$ per year. As a cog in the machine, I did not see any of that savings in my paycheck.