contingent transaction

contingent transaction　或有经济业务　

a contingent transaction is the advertisement for sale，or the actual sale，service or rights or privileges at a price or with a rebate or payment or other consideration to the purchaser that is contingent upon the procurement of prospective customers procured by the purchaser，or the procurement of sales，leases or rentals of merchandise，services，rights or privileges to other persons procured by the purchaser.