February 8th, 2017. I emailed an escort. I was planning a trip to her area (Philly) in two weeks, and I wanted to see her availability. I did not get a response.

She's pretty well organized. And if you're still upset she didn't reply more than three years ago, that's a shame.

I was never upset to begin with. I honestly forgot I emailed her. I moved on and reached out to another escort and had a really good appointment with her.

the flaky factor.  As we all know, there are some really sharp escorts, and some very flaky ones.

Just the other day I got a response from a text I sent on 5/2018!...Bottom line, we had a good laugh over it and she asked if there was still any interest. She sent CURRENT pictures and her website and sure there's still an interest and we're working on the details. I wonder if I'll get the 2018 entrance tag? Hmmmmm.....  
I just hope we don't meet in 2023.

Due to the recent times and less demand, it seems some are desperate to just go randomly through messaging/phone/email history and solicit anyone who ever wanted a piece. At least that's my take on it.

Maybe only once a year or so, but I get hit up by a provider I saw once more than 4 years past.  
I once had a provider who admitted to blacklisting me for cancelling a session but she would send me texts and emails when one of her friends was touring my town.

Some of the ladies i met a couple of years ago would contact me again!  
My kryptonite gal contacted me a year ago, when she was in the area, but I was sick as a dog, and couldn't make it down to see her. How I regret that bad timing...

Made an appointment in April to see this provider the day before. Texed a hour before to confirm. Got to the site and no response. Texed twice in 30 minutes; nothing. She responded 30 minutes later apologizing she had fallen asleep. No big deal  I was able to get a last minute with another provider I knew very nearby. Reached out to her 2-3 weeks ago and didn't hear back until very late at night and said she was having phones problems. As someone relativity new to the scene I blew it off.  She recently has has some glowing reviews on TER so I'm going to give it another shot this weekend. Her marketing and web site are top of the charts.

Basic member right now, so I'm not sure what her reviews say, but I have a previous flaky "encounter" with her.

I still get advertising emails from the screener of a lady who now refuses to see me. I didn't do anything (too) out of line.

I don't

Did you at least secure a discount?

Trying to rebuild her book of business now that the shut down is ending.  I've received several unsolicited emails from long ago contacts letting me know they are touring again.

I've known a few girls with straight jobs/careers who have popped up a few years apart for a few weeks/months at a time. There's one I saw three times about five years ago. Two years ago she pops up again, I see here twice, then I contact her for a third appointment and she never replies.
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This is mildly annoying, but she was a fantastic fuck, so if she pops up again I'll definitely try to see her.

She offered at the time but that was months ago. Not planning on bringing it up unless she remembers.

EXACTLY!

But probably not to the OP’s point, I have just started to hear from women I reached out in March and got crickets back then. That seems completely understandable.