The last two months I’ve had two providers change their schedules and not notify me about it, after I had made an appointment with them. Fortunately neither required a deposit but this was still very annoying.

you should check back with her and reconfirm a couple of days before the appointment.  If she doesn't respond, then you are within your rights to assume she is not coming and book for that day with someone else.  It's incumbent on anybody who doesn't like to have their time wasted by others to be pro-active in re-confirming appointments so this kind of thing does not happen.  Putting the responsibility to stay in communication about the session solely on the provider is a recipe for getting stood up without notice, just like you experienced.  

Unfortunately it has happened to me twice within the last 2 weeks.  One lady I inquired about said she would come, but needed enough bookings to justify the trip.  Her rate was 800 per hour, so you do the math on how many guys she would need before she solidified her calendar.  No biggie as I knew the stipulations before hand and it was a long-shot that she'd visit anyways.  The other lady was 500/hr, same issue, not enough requests.  But she did update her ad on the TER city board saying she cancelled.  You gotta understand that for them this is a business, and with gas, hotels, food, etc. they have a goal in mind when they schedule for a city.  I would suggest maybe hit up your local board and try and get more guys to reach out to her/them to generate some more business.  Otherwise if it's a city they don't normally visit, then it's more than likely not going to make the cut.  

Conan was wondering.

But I do think in the second case you should have been prepared for that. Key phrase being "would contact me when she finalizes her plans". I would take that as a tentative rather than a certain appointment.  I think I would have assumed she was not coming if I had not heard anything by about the 25th, perhaps touching base to get her confirmation on status.

Unfortunately, many escorts do not prioritize customer service.

Some of these Providers are in this for the short term, lack customer service skills, lack consideration, and at the end of the day only care about one thing;  it does not take a genius on this F***board to figure out what that is!

Apparently, I was the only appt she had so she canceled her trip.  I had already confirmed out appt, but I contacted her to "check-in" and re-confirm our appt and that's when she told me she was canceling her visit.   I'm not sure she'll return but I hope she will, at some point.    

trick question.  Think about it for a few days.  Lol

If providers are as professional as they claim and that's how they want to be treated, then they should ABSOLUTELY keep clients with confirmed scheduled dates informed of up-to-date changes to their travel plans to their city.

Yes, I can weigh in here and tell all that this also happened to me with three different providers last month who were based in the Los Angeles area. I went through their screening and passed all and then the appointments were set up. Within 3 days of each screening approval the appointments were cancelled due to 'change in touring schedule' -  At least it happened 2 weeks out from the appointment and not 1 day before. Even the top rated providers can be highly unreliable. Nature of the biz I suppose. If you want dependable buy a sex doll.  

As some of you know, some providers do not feel any reason to contact their clients when they decide to change plans. Note: at no time do I ever complain about the change in plans. Only their failure to inform of change in plans. My issue is with those providers who decided, at the last minute, that they just don’t feel like meeting me at the appointed time. And, don’t want to be bothered to tell me before I have made commitments to be there. Just radio silence. Several times I only found out when I called that morning to be given an address. I would not have heard from the provider otherwise. It’s my actual experience.
I ask if you will appoint with me at 8am, if you don’t want to, just turn my request down. EZPZ. No harm, no foul.
If you appoint with me, then have a change of mind, fine. Just let me know as far ahead as possible so I can change my plans while it’s still possible. But, to ghost your prospective client, saying nothing, leaving him with wasted time etc. is as unconscionable as the client breaking or no show for your appointment, wasting YOUR time costing YOU money.
I get a huge laugh when a provider has the Gall to demand compensation for a missed appointment, when none of them ever offer compensation to the client for his wasted time and blown arrangements.  I can hear the huffing and puffing from some of the providers. “But, we are the ones losing money”  of course, the client’s time and planning have no value. How many providers would appoint to meet me if I warned them ahead of time,  
There will be a charge of 1/2 the agreed upon honorarium, for a no show for our appointment. I guarantee that none would agree to the same rules imposed on me.  
So, ladies, you know that it’s very poor form to no show, and shows poor manners and lack of class.  Changing your schedule? Fine, it’s your prerogative. But with that comes your responsibility to inform as soon as you know. Costs you nothing but a few seconds of time. Don’t try to put it on the client to find out on his own.. You are changing things, YOU notify.

burden on keeping the lines of communication open on the provider.  Experienced customers may sometimes be reluctant to follow up and ask if they are still confirmed.  If the provider is super-organized, they might become annoyed at the suggestion that they are less than professional, forgetful, or lazy, and that can put a cloud over the meeting.  In my experience, if I book more than a week out with a touring girl, I expect she will reconfirm with me twice, once 4 or 5 days in advance and then again the day before the meet. Ladies who don't do this make the customers nervous, especially if they paid a deposit.  

I had this happen back in 2021.  The appt was booked and I was good to go.  Either the day of our appt or the night before (I forget), she canceled due to a family issue.  Cool, no problem.   I checked back with her 3-4 days later to see how things were going and to see if she was open to re-scheduling and I never heard back.  Not cool, but c'est la vie.  Of course, I moved on and had some amazing experiences with some fantastic ladies!

of providers disrespecting and caring not one whit for clients.

A client's time is just as valuable as a provider's time.  

this kind of attitude on the part of the seller is called an "adhesion" contract, which means that the terms are not negotiable even though the contract is woefully one-sided in favor of the seller.  It's a take, it or leave it, and if you don't like it, fuck off, but I appreciate that you have renamed negotiation as "time-wasting".  Lol

That’s not a contract. I won’t bore you and others by defining what a contact is (Google it if you don’t know, which apparently you don’t), but QB’s statement on her website, and her “attitude”, aren’t a contract, let alone a contract of adhesion.

Cornell Law School, but the definition on their website sounds an awful lot like what I said.  

The phrase you added:
"...a contract of adhesion, is a contract where the parties are of such disproportionate bargaining power..."

Cuz he needs it. He's a know-it-all who doesn't know it all.

The point is, the quote above from QB’s web site isn’t a CONTRACT at all, of any type.  Thus it can’t be a contract of adhesion.

where she says if a customer isn't willing to acquiesce to her terms and fully comply with her requirements for obtaining  her service, then don't waste her time.  Does that sound to you like she is open to negotiation, or does that sound like take it or leave it?  

Cornel Law School website, not from QB.  Don't know how you thought it was from her, but it's not.

...where there are hundreds of thousands of providers reviewed in the U.S.  If Queef Bia was the ONLY provider in the U.S. and a guy wanted to desperately pay for sex, he would be forced to acquiesce to the terms of the offer in her ad and accept them.  He would have no choice but to "take" it.  THAT is what constitutes a contract of adhesion (along with consideration of course).  

that’s it’s always about you.

is not the same as continuing the negotiation to come to an equitable arrangement.  Maybe I was not as articulate in making my point as I could have been, but nevertheless, the way she approaches her business is very much like your Acme example, although that example is extreme by using the false analogy that they are the ONLY supplier and that QB is NOT the only supplier of pussy.  However, she is the only supplier of HER pussy, and if that is what someone wants, he or she will not be able to negotiate any aspect of seeing her, which is LIKE a contract of adhesion.    

since I am not sure what your stance on this actually is, do you also hold the same position for issues like rates, increased real world info (unredacted? ID, work info, selfies holding said ID, tax info -- which I honestly have some doubts about) and the like?

The biz is extremely assymetric but some people want to pretend or really beleive it isn't.