I get, on occasion, a "wyd" or "how ya been" email/text. While I view that as technically soliciting, it doesn't bother me in the least. If you are saying something much more direct, like " We need to get together soon. Are you around next week?" now that is something very rare, like maybe 2 or 3 times in 15 years.

I had a regular gal that would say she missed me right around the 30th of each month.  

My ATF contacts me about a week ahead of her travels through my area. She knows I want to see her anytime she's available hereabouts and she gives me first dibs on her short time here.

I usually get invited back in person on leaving.  
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There are many escorts who think it is a violation of discretion to use your email/text to solicit biz.  For some people those sorts of communications could cause problems.
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However if you've established a longer term relationship, then those sorts of details are probably already worked out.

I don't care who(The Booker or Escort) invites you back. Its all about the money & nothing else. Don't think things like you are the hottest/best fuck that she's ever had or that she's falling in love with or anything of that nature. The person who contacted you just wants the $$$$MONEY$$$$ that he/she lost.

Because you are nothing more than a wallet with legs. The rest is an illusion called GFE.

OTOH I have gotten "How are you" reminders from ladies I've seen multiple times and once or twice an invitation from a lady who knows I love 3somes when she has a new available partner.  

my own personal experiences.  I have been told many times that I'm a wallet with a dick attached, . . . . or was it that I'm a dick with a wallet attached?  I don't remember, but it's the same thing, isn't it?  

I just thought it was a strange coincidence that they always seemed to invite me back at the end as I was handing them the tip.  BTW, I have been invited back 100% of the time.  Can anybody else beat that?  Lol

I have a local lady that contacts me everytime she gets a incall location.
Most of the time she will ask me what days work for me before she books the room for the week.

I once got invited back for a free session with both the lady and her friend.  

a foot up your ass, an invitation is an invitation, especially for a FREE session.  Kudos.  

If you get an invitation and you pay for the meet up, it's a session.

It makes no sense for a "So-Called Escort/Provider" to give it up for free. It's pointless for the female to be on this site and to have free sex.

I too get emails that say things like "let's get together" "you around" usually around 3am . The best way to respond to a provider you would like to meet is too include your references on the first email. I have my assistant send out reference request emails asap.  

“I ain’t never been called big, but I always get called back”

Even my ATFs don't contact me when they are available.  I did have one mature Thai provider harass me with phone calls and voicemails once.  She just wanted the money, of course, but she wasn't worth it, so I ignored her.

I receive emails whenever ladies I've seen tour my city.  Not uncommon.  

Maybe you are not their "ATF" then..

There have only been 2 providers that have unsolicitedly contacted me for an appointment.

I always got the impression that soliciting business like that out of nowhere was in bad taste, no?

I would never get call backs until covid hit.

but it does get tedious sometimes to get a lot of the "I miss you, honey" text messages.  However, the one I HAD to go see took a more clever approach.  She texted me, "It's been awihile.  Are yoiu cheating on me?  LOL   I loved it, and went to see her the next day.  Tongue in cheek, with irony on the side should not go unrewarded.

The ones who reach out aren’t the cream of the crop. From my experience. We did have a fun freaky one from Utah who was into the wife who offered discounted sessions lol. Bit of a ego kill there