If you’re auditioning, you’re earning your agent money.
The agent’s most important business relationship is with the casting director. Submitting good actors allows the casting director to have a good session.
A good session occurs when a casting director’s submission to the producers is of high quality.
That means the casting director will get hired for other shows. That is how they make their money.
They are thankful for the agents who send good actors. The agents are thankful for the actors who do good auditions.
Neither group ever tells you this, but that is how the system works.
You earn the agents money not just by booking jobs, but by keeping the system working well.