try Tryst.link, Preferred411 and here on TER also. A google search will bring up many ad sites.

Except with p411 you need to join for $100/6month and get verified to get in and see the escort list.

Referrals from solid regulars in my rotation.

Mostly on TER for me is where I find providers.  Also referrals.  Twitter seems to have a lot of providers, but most don't have reviews here for whatever reason.

Is this a joke?

I don’t pay to advertise & P411 is no bueno. TER & Twitter is all I use, but this is a hobby for me it is not career. Lucky me I have lovers, and friends who truly adore me. I also, have other fun jobs I love that keep me busy.

C'mon mannnnnnnnn

What's wrong with p411?

I'm usually all over the place. I don't have one particular place. But I know where I don't look and that's Eros.

P411

Virtually every Eros review I read is an agency scam where a different lady shows up, takes the donation, and then demands more money to play. I can't tell you the last time I saw a positive experience reviewed on Eros. It's a hard pass for me.

But nothing precludes anyone from doing additional screening.  I mean TER and twitter don't provide screening either.

P411's screening isn't enough for all providers and some guys DO assume they're verified. But it's still a good place for a girl to have a presence and just insist on additional screening.

Can't you see the names and profiles of those who have given "okays"? I always assumed that membership in P411 meant only verification of the "admirer's" identity, but it was the okays that mattered and those are visible to "companions." Is that not the case?

Eros has lots of scams and doesn't filter them out in spite of ample evidence. One outrageous DMV area scam on Eros had photos an attractive Indian woman but lots of reports on multiple sites that she just took the money and threatened to call cops or a large and/or armed male neighbor if you didn't leave immediately because she wasn't "that kind of woman."  Also, to add insult to injury, she was apparently quite unattractive and heavy and nothing like "her" photos if I remember the reports correctly. In spite of her being a well-known scam artist, Eros kept running her ads for several years and may still be doing so for all I know. There were some real finds on Eros ten years ago, but if the real-to-scam ratio has deteriorated as much as with some other sites without reviews (e.g., "Seeking"), it is probably far worse now than was the last time I looked into it.  

right after FOSTA became law, EROS began demanding tons of personal information from gals who wanted to advertise on it including full face photos, and similar easy ways to be identified.   Several gals I know have told me the same story.

EROS was raided by the Feds in November 2017. Their sites went down for ~2 hours and then came back up. The Feds got boxes and boxes of evidence. There has been an assumption that EROS (US office, that is) is still operating but, when necessary, cooperating with the Feds.  
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Here's a link to the General Discussion on TER and a couple of links to still accessible news stories:
http://www.theeroticreview.com/discussion-boards/ter-general-board-12/re-has-that-ever-happened-to-ter-932435
http://www.xbiz.com/news/231580/report-eros-guides-call-center-is-raided
Eros-Guide's Call Center Is Raided
http://abc11.com/youngsville-feds-federal-raid-possible-sex-crimes/2614696/
Feds raid Youngsville [North Carolina] business for possible sex, cyber crimes

Where's the evidence that the Feds have made a single arrest as a result?

Following Fisher's comment, perhaps the feds just wanted to get real info so they never have to deal with any bait and switch sessions? Only partly tongue-in-cheek.

and when the circumstances favor whatever political motive may be at hand.

It could be any number of reasons. For example:

Had a few bad times but mostly good haven’t loss an organ. Tna before it was hacked.

Yes, when a lady looks at your profile on P411 she sees your okays and the identities of the providers who gave them.

I'd say 1st to Google a highly reviewed providers phone # and see where she post outside of the site you found her. I have some guys do that when they question my Verfied Eros status 😉 Otherwise here in New York, Eros works best but I pay about 475$ every 2 weeks to post, Tryst #2, Slixa #3 & P411 #4 but i usually get extended visits more often from fellas on 411. I also use adultsearch/look and EM and models-world.com.  Most other site are trash or scrapper sites. Twitter is good as well but personally I try to keep my social presence separate.  
Other that online I personally freestyle and like to go out and meet some nice guys at the hotel bars or higher end bars 20$ + per cocktail  and also at the strip clubs here in NYC 😉

When you go out on the town, are you looking for the same top 10% that all the civie girls are chasing, or are you looking for anyone willing?  How would a guy know your intention?  I mean I think it would be cool to meet a provider by chance at a bar, but I don't go around picking up chicks because for one I am married and don't want a relationship, and second, I ain't no Carry Grant (substitute era appropriate hunk)  and the rejections would be endless.

MagnumUser,
  Just Search "Escort Sites" and you'll find a lot of different site.