Earlier quoted context omitted.
I haven't looked into his case. What was his method - what did he do, so that the girls couldn't call for help? I think classically they are made to be illegal (no passport, have perhaps committed crime of prostitution, so they think they can not go to the police). Is that also what Epstein did?
You seem to think that if people aren't under lock and key, they aren't being coerced. Which rather misses the wider spectrum of coercion. It could, for example, simply be a guilt trip about how poor their family is, how the extra money he was giving them would help. They wouldn't want to make their family starve, would they? Or not. There's no end to the possibilities.
Coercion is the practice of persuading someone to do something by using force or threats.
"guilt trip about how poor their family is" does not qualify as "force or threats".
Watering down term "coercion" makes real coercion less noticeable.