Sometimes they arrange with her to leave her place after a certain period, promising her an easier position or a better wage.

They favor the girl who changes often.

"You're a nice kind of a customer!" jeered one proprietor to a girl who boasted that she had been in a family for five years.

The girl was a _customer_ to him, and she was nothing more.
To his profitable customer the agent is often very accommodating.

If she lacks references he writes her flattering ones, or loans her a reference written by some woman of prominence.