Most charge fees, but some give advice for free to drum up business for their brokerage firms.

大部分人都收费，但是一些人不收费，因为要为他的经纪公司做宣传。

youdao

We charge a standard international shipping charge which varies by country and there will also be brokerage or duty fees charged by UPS that the customer is responsible for.

我们支付常规国际运送费用，不同国家金额不一。此外UPS还会征收手续费或者关税，费用由客户承担。

youdao

Firms charge either a spread the difference between what the brokerage versus the investor pays for a currency or a 2 percent fee plus a cut of the profit.

WSJ: Currency Traders Follow the Leader | WSJ.Money Summer 2013

Does the consultant have an obligation to disclose the additional money it will earn from providing brokerage services or that the rate it is proposing may be more than another broker might charge?

FORBES: Consultants With Affiliated Broker-Dealers: How Independent Is Their Advice? (April 1, 1996 )