Very accurate info, this guy knows what he is talking about.
Joah's high English abilities make her stand out from all the other K-girls. Objectively, none of her other qualities really make her stand out except the English. That makes it easier to communicate and connect with her, hence the multi-hours and the dates and what not.
That stuff is not my cup of tea, but for ultra-rich people, it may be pretty fun, actually, I can see how.
Joah should have the ability to pick and choose what customers she wants, it is a free market, and she got something that others want