A sum of money that is paid to an employee as a bonus for encouraging customers to buy additional or more expensive goods or services. The tour company offers its guide push money if they can convince tourists to opt into the expensive river cruise.Without the offer of push money, we had little incentive to get customers to buy anything they didn't ask for directly.
push money
n. extra money paid to a salesperson to sell certain merchandise aggressively. (see also spiff.) The manufacturer supplied a little push money that even the store manager didn’t know about.