A bonus is a contractual obligation, just like sales bonus salesperson get or revenue target bonus management get. In this case it's a payment for the recruitm

A bonus is a contractual obligation, just like sales bonus salesperson get or revenue target bonus management get. In this case it's a payment for the recruitment service. It's not an informal bonus. Technical recruiters typically got 1/4 of yearly salary as payment. $10K recruitment bonus is cheap.