Ask a local real estate agent or real estate broker how much base pay they make. Or, heck, a car salesperson or an ad salesperson at your local TV or radio station. It’s all commission-based. In some of these fields in the US the norm is 100% commission-based with no base pay. In others someone might make one to three times minimum wage, but will end up being some of the highest-paid people in the company based on commissions of anywhere from 1% to 50%, depending on the industry.