How do travel advisors get paid?
Mostly by the companies they book. Travel advisors make most of their income from commissions paid by hotels and other travel companies, usually once the trip is over. Many also charge their clients service fees: the U.S. Bureau of Labor Statistics notes that earnings for many travel agents depend on commissions and service fees.
So ask before you start: is there a fee, is it per trip or flat, and is any of it credited against what you book?