I know and am neighbors with one of the $3000/night girls.
No, I’m not a client, and no, you can’t contact me for an introduction. 
I am her neighbor, and for reasons unknown to me, she seems to trust me, so I’ll be really careful about what information I place here.
First, she has a day job, which pays reasonably well, but isn’t a traditional 9-to-5 kinda gig. It’s a… creative… kind of job, and while it allows her to be “creative”, it’s a feast-or-famine kind of thing. Escorting fills in the gaps and allows her to live better than she would otherwise. It also allows her contact with levels of society she wouldn’t ordinarily see, the opportunity to dine at top-flight restaurants, attend sold-out Broadway productions, and generally provides a lifestyle she enjoys. She tells me that she also very much enjoys the sex, especially as the kind of clients (not all men!) she caters to tend to be good in bed. It seems that education comes with money, and educated people, on the whole, are better lovers.
What she claims to provide is intelligent conversation (Yup. She’s got that), discretion, beauty (Oh, yes. Definately got that), warmth, and very good sex (No idea, and likely will never know. Just as well). She ‘works’ about twice a week, and the scale ranges from $1500 for theater, dinner, and an evening, to $4500 for a fly-away weekend (customer pays airfare, accomodations and all expenses, in addition to fee). She’s shrewd, educated, friendly, and cautious as all hell. Weird combination. Hell, she even pays taxes on her escorting income, listing it as consultancy fees.
She’s not typical, but she assures me that she’s not an annomaly, either. She’s also mentioned an ‘acquaintance’ That bills out $24,000 per weekend, only takes weekend-long gigs, and will be retiring from the Life soon, at the dusty old age of 26. As a multi-millionare. I dunno if she’s pulling my leg, but her ‘acquaintance’ works the DC-London-Paris circuit, so I suppose it’s possible.
There you are. More than you ever thought you’d hear on the subject.
[sub]Oh, and the $45.00 gets you a social disease or a visit to the local lock-up when she turns out to be part of the vice squad.[/sub]