earn out

Verb

 * 1)  To qualify for a bonus or other amount of money that has been promised.
 * 2)  To make more money from a book than it cost to run an advertising campaign for it; to make enough in royalties to cover the advance a book received.
 * 1)  To make more money from a book than it cost to run an advertising campaign for it; to make enough in royalties to cover the advance a book received.