profit motive

:  a valuable return :  gain

:  the excess of returns over expenditure in a transaction or series of transactions

:  the excess of the selling price of goods over their cost

:  to be of service or advantage :  avail

:  to derive benefit :  gain

:  to make a profit

:  something (such as a need or desire) that causes a person to act

:  a recurrent phrase or figure that is developed through the course of a musical composition

:  motif

:  of or relating to motion or the causing of motion

:  moving or tending to move to action

:  motivate