Here's what your porncompanions is really about. It's a scam and St Clair is a fraud

https://pornstarescortsexposed.com/tag/trinity-st-clair/

There really isn’t any reputable pornstar agencies.  Better to simply try and contact them personally.

Lita at Lourdes, Adonia at Luxury. That's about it. Too bad so many that are known to be available through agents are not so keen on direct contact via social media in this regard...

Also sucks to only be able to post on here when outside of the US.

I have used her agency twice and have never had any issues

I've used TLC and never had an issue. In fact, I made an inquiry recently with Adonia. She made a contact professionally, responded in a timely manner and although the answer was no....she was kind enough to inquire and respond...

Yes, I was able to meet India Summer through them!

The issue for me is the price and no direct communication with the lady

There are a number of agencies that represent porn stars who provide escort services.  They all have their pluses and minuses.  Among the best (IMHO) are TheLuxuryCompanion and Alluring Intros.    

I've worked with Adonia for years.  She's always provided me with quality ladies and people I've recommended her to have reported back to me that she was excellent.  She is less interested in making money, per se, than she is in making clients (and the girls) happy.  That is, she will not put two people together just for the sake of earning a buck as some of the other agencies will do.  She doesn't ask for deposits (some other agencies and some independent porn stars do), and she makes sure that the person you select is available to you when you book her - there's no double booking, and I've never heard of any of the porn stars flaking out on a date Adonia booked.  

Alluring Intros started a few years ago (they were formerly Executive Model Introductions) and they represent a lot of porn stars and models.  I've yet to use them since every time I've tried the girls were already booked but they do regular tours to large cities like Manhattan which TLC doesn't do as much.  Some of the porn stars work with both agencies.  As to which has the larger or better selection - hard to tell.  I think they're about equal in that regard.

As for talking to the girls directly:  Yes, some porn stars do book on their own and their rates are often lower than they are with an agency.  The difference is when you're working with an agent, there's someone looking out for you and the girls.  There are many advantages to working with agencies and, truthfully, that's what you're paying the slightly higher prices for - that personal touch that the agent offers.  However, many porn stars will only work through an agency.  And the ones that book independently often have rigorous screening requirements that not everyone is willing to go through.

Agencies and bookers who still have some website, ads, or presence on social media. Though I'm not sure how active or responsive they all are. Some that seemed to have not been mentioned include:  
Alluring Intros formerly Exclusive Model Introductions
Hetaera Agency
Pamela Peaks
My Platinum Provider
Chocolate Citi Models formerly Top Level Companions
Elite Experience
Premier Playdate  
Sunshine Angels  
Perfection Models, though I guess that guy is suppose to be the worst especially if you get on his bad side  

I know there are probably others I may be forgetting to mention. Then there are bookers like: Le Vip Collection, Beautiful Introductions,  Book The Centerfold that deal more with models / published models and not so much with booking porn stars.

I mentioned Alluring Intros in my post.

I deliberately did not mention other agencies because, IME, they aren't as good as the two that I mentioned.  

Pamela Peaks used to be good but there's a rumor circulating that she's no longer around and may have retired.

One that you left out is Lourdes which often has models traveling to big cities like NYC  and is run/owned by the former porn star Lita Chase.  I've had issues with her so I do not recommend that agency.  The prices she quotes are usually much higher than other agencies and most of the women she represents are available from TLC and AIA for less, I think.

And I definitely recommend staying away from Perfection Models...

question about Alluring Intros aka EMI, are the Alluring Intros rates higher than if the pornstar is also listed with another agency?

I've had good experiences with Hetaera agency, but that's just me.

It was explained to me that this is the way it works:

The girl sets the rate that she wants for a date.

The agency then ads their fee on top of that.  The fee that they add is based on a number of factors such as: the woman's popularity, the city, any expenses the agency has shelled out (plane fare, hotel, etc.) and whatever profit margin they want.  This is not an all-inclusive list though.  

Essentially, you have to know which city, and what expenses the agency shelled out, and a lot of other information that makes it hard to compare rates.  Especially since I tend to suspect that some of the agencies give better rates to guys who book with them often - i.e. "frequent flyers".

I've found comparing the rates for Perfection Models, Lourdes, AIA, and TLC that sometimes, one agency's rates may be lower and other times, for other women, it might be higher.  That is to say, for girl A, TLC might be the lowest but for girl B, in the same city, AIA might be the lowest when both TLC and AIA represent both A and B.  

Does any of that make sense?

Agree with Mr French. Always had great experiences with TLC. They have even put me in touch with girls on my wish list not booking through them so i could book direct.

They kept deposits from clients and did not return them when the tour was cancelled.

TLC is the best in my experience.

Concur on most of what has been said on the other agencies but I had great experience with Chocolate Citi with a girl on tour but had a last minute cancellation when I was in LA.  However, they never requested a deposit or anything and I imagine it was the star changing plans more then CC.

I also had good experiences with this agency. Have seen Havana and Cherry Hilson when she was with them.

Actually what really sucks IMO is that they are doing this for reasons of safety for the most part when in fact the agencies are do little for them in that regard. They feel going through the agencies gives them some level of safety from scams, LEO's and violence. The fact is most could probably do as good or better screening on their own and hire their own driver for less than the agency would take. The agents just care about getting their cut and keeping them as close to exclusive as possible.